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Answered on 19/11/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

What must be subtracted from each term of 5 : 7, so that it is equal to 3 : 4?

Richa Kumari

-1
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Answered on 06/12/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

If 0.75 : x :: 5 : 8, then what is the value of x?

Ankit D. Javeri

Mathematics Tutor

If a:b::c:d then ad= bc. Therefore, 0.75:x::5:8 implies 5x=8*0.75 i.e., x=6/5=1.20.
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Answered on 27/11/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

If a:b = 5:3, find the value of (5a + 8b) : (6a - 7b)?

Shyam

Trainer

49/9 or 5.44
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Answered on 05/12/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

Find the mean proportion of 25, 64?

Chandan Singh

Tutor

Mean proportion = square root of (25*64) = 40 Ans.
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Answered on 22/11/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

If x:y = 9:10, find the value of (5x + 3y) : (5x - 3y)?

RAM MOHAN A.

The answer is 5:1. SOL :- x : y=9 : 10==> 10 x=9 y==> 5 x = 9 y/2, substituting 9y/2 for 5x in ( 5 x + 3 y) : (5 x - 3 y) gives 5: 1
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Answered on 25/11/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

If A:B = 4:5, B:C = 6:7 and C:D = 14:15, find A:D?

Nagesh Guledagudda

Programming Passionate

(B/C ) * (C/D)= (6/7) * (14/15) => B/D = 4/5 => (A/B)*(B/D)=(4/5)*(4/5) => A/D = 16/25.
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Answered on 20 Mar CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

Two numbers are respectively 20% and 50% more than a third number. What is the ratio of the two numbers?

Vikas Verma

Tutor

4 : 5.
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Answered on 06/12/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

If (4a + 9b) : (4c + 9d) = (4a - 9b) : (4c - 9d), show that a : b = c : d?

Sarvajeet Kumar

An Experienced Trainer

(By Componendo and Dividendo) 8a:18b=8c:18d or a:b = c:d.
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Answered on 08/12/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number... read more
The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20 % and 10 % respectively, what will be the new ratio? read less

Rama Krishna Ravulapalli

Rs. 1,90,085.
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Answered on 07/12/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Ratio and Proportion

If x : y : z, show that x : z = (square of x) : (square of y)?

Shambhavi S.

As we know that , x:y:z , this implies that, y^2=x*z. Simplifying x:z=x^2:y^2, we get, y^2=x*z, which is the same as above. Thus, they are equal.
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