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Post a LessonAnswered on 02 Feb Learn Comparing quantities
Pooja R. Jain
Let's calculate the cost price (CP) and selling price (SP) to determine the gain or loss and the percentage.
Cost Price (CP): The shopkeeper purchased 200 bulbs for Rs. 10 each. CP=Number of bulbs×Cost per bulbCP=Number of bulbs×Cost per bulb CP=200×10CP=200×10 CP=Rs.2000CP=Rs.2000
Selling Price (SP): 5 bulbs were fused and thrown away. So, the shopkeeper sold 200−5=195200−5=195 bulbs at Rs. 12 each. SP=Number of bulbs sold×Selling price per bulbSP=Number of bulbs sold×Selling price per bulb SP=195×12SP=195×12 SP=Rs.2340SP=Rs.2340
Gain or Loss: Gain or Loss=SP−CPGain or Loss=SP−CP Gain or Loss=2340−2000Gain or Loss=2340−2000 Gain=Rs.340Gain=Rs.340
Gain Percentage: Gain Percentage=(GainCP)×100Gain Percentage=(CPGain)×100 Gain Percentage=()×100Gain Percentage=()×100 Gain Percentage=17%Gain Percentage=17%
Therefore, the shopkeeper gained 17% by selling the bulbs.
Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
To find the profit or loss percentage, follow these steps:
Cost Price (CP): The cost price is the sum of the purchase cost and the repair cost. CP=Purchase cost+Repair costCP=Purchase cost+Repair cost CP=Rs.2500+Rs.500CP=Rs.2500+Rs.500 CP=Rs.3000CP=Rs.3000
Selling Price (SP): The TV was sold for Rs. 3300. SP=Rs.3300SP=Rs.3300
Profit or Loss: Profit or Loss=SP−CPProfit or Loss=SP−CP Profit or Loss=3300−3000Profit or Loss=3300−3000 Profit=Rs.300Profit=Rs.300
Profit Percentage: Profit Percentage=(ProfitCP)×100Profit Percentage=(CPProfit)×100 Profit Percentage=()×100Profit Percentage=()×100 Profit Percentage=10%Profit Percentage=10%
Therefore, the profit percentage is 10%.
Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
To calculate the amount to be paid on a loan compounded half-yearly, you can use the compound interest formula:
A=P(1+rn)ntA=P(1+nr)nt
where:
In this case:
Plug these values into the formula:
A=12000(1+0.102)2×1.5A=12000(1+20.10)2×1.5
A=12000(1+0.05)3A=12000(1+0.05)3
Now, calculate the values:
A=12000×(1.05)3A=12000×(1.05)3
A≈12000×1.157625A≈12000×1.157625
A≈13951.50A≈13951.50
Therefore, the amount to be paid on the loan after 1½ years at 10% per annum compounded half-yearly is approximately Rs. 13,951.50.
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Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
It seems there might be a confusion in the given information. The population of a city is usually measured in terms of the number of people, not in rupees. If you meant to say the population of a city was 20,000 in 1997, and it increased at the rate of 5% per annum, then we can calculate the population at the end of the year 2000.
Let PP be the population in 1997.
Given that the population increases at a rate of 5% per annum, the growth factor is 1+5100=1.051+1005=1.05.
The population at the end of the year 2000 (t=2000−1997=3t=2000−1997=3 years) can be calculated using the formula for compound interest:
Population at the end of 2000=P×(1.05)3Population at the end of 2000=P×(1.05)3
Population at the end of 2000=20000×(1.05)3Population at the end of 2000=20000×(1.05)3
Now, calculate the value:
Population at the end of 2000≈20000×1.157625Population at the end of 2000≈20000×1.157625
Population at the end of 2000≈23152.50Population at the end of 2000≈23152.50
Therefore, the population of the city at the end of the year 2000 is approximately 23,152.50.
Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
To find the discount and discount percentage, you can use the following formulas:
Discount (DD): D=Marked Price−Selling PriceD=Marked Price−Selling Price
Discount Percentage ((D%)): D%=(DiscountMarked Price)×100D%=(Marked PriceDiscount)×100
Given:
Discount (DD): D=15600−12480D=15600−12480 D=Rs.3120D=Rs.3120
Discount Percentage ((D%)): D%=()×100D%=)×100 D%=20%D%=20%
Therefore, the discount given is Rs. 3120, and the discount percentage is 20%.
Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
It seems like there's a symbol missing in your question where you wrote "â–¡". If you intended to use a specific number or expression in place of "â–¡", please provide the correct information so that I can help you convert it to a percentage. Alternatively, if you have a different question, please clarify, and I'll be happy to assist you.
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Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
To calculate the current price of the box after a 20% increase from Rs 25,000 last year, you can use the following formula:
Current Price = Last Year's Price + (Last Year's Price * Increase Percentage)
In this case:
Current Price = Rs 25,000 + (Rs 25,000 * 0.20)
Current Price = Rs 25,000 + Rs 5,000
Current Price = Rs 30,000
Therefore, the current price of the box should be Rs 30,000.
Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
To find the population of the city after 2 years with a 5% annual increase, you can use the formula for compound interest:
Future Population=Present Population×(1+Rate of Increase100)Number of YearsFuture Population=Present Population×(1+100Rate of Increase)Number of Years
In this case:
Future Population=20,00,000×(1+5100)2Future Population=20,00,000×(1+1005)2
Future Population=20,00,000×(1.05)2Future Population=20,00,000×(1.05)2
Future Population=20,00,000×1.1025Future Population=20,00,000×1.1025
Future Population≈22,05,000Future Population≈22,05,000
Therefore, the population of the city after 2 years would be approximately 22.05 lakh.
Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
To find the amount that Ram will get after 18 months on a principal of ₹4,096 at a compound interest rate of 12.5% per annum, compounded half-yearly, we can use the compound interest formula:
A=P(1+rn)ntA=P(1+nr)nt
Where:
In this case:
A=4096(1+0.1252)2×1812A=4096(1+20.125)2×1218
A=4096(1+0.0625)3A=4096(1+0.0625)3
A=4096×1.1953125A=4096×1.1953125
A≈₹4,896.00A≈₹4,896.00
Therefore, Ram will get approximately ₹4,896.00 after 18 months.
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Answered on 02 Feb Learn Comparing quantities
Pooja R. Jain
To solve this problem, let's assume the population in the year 2001 was PP. We can then use the compound interest formula for population growth:
Population=P×(1+r100)tPopulation=P×(1+100r)t
Where:
In this case: (i) To find the population in 2001, we need to find PP. We are given that the population increased to 54,000 in 2003 at a rate of 5% per annum. So, t=2t=2 years and r=5r=5.
54,000=P×(1+5100)254,000=P×(1+1005)2
Solving for PP: P=54,000(1.05)2P=(1.05)254,000
(ii) To find the population in 2005, we need to find the population after 4 years. t=4t=4 years and r=5r=5.
Population in 2005=P×(1+5100)4Population in 2005=P×(1+1005)4
Let's calculate:
(i) P=54,000(1.05)2(i) P=(1.05)254,000 (ii) Population in 2005=P×(1+5100)4(ii) Population in 2005=P×(1+1005)4
Please note that for accurate calculations, you should use a calculator or software.
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