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Lesson Posted on 06 Feb CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

Angle ACB = 90 Degree And Angle ACD = x. Find x.

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

Question: Solution: Method 1 given below: Method 2 given below: read more

Question:

Solution:

Method 1 given below:

Method 2 given below:

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Comments Lesson Posted on 31 Jan CBSE/Class 9/Mathematics CBSE/Class 10/Maths1 Exam Coaching/NTSE exam Coaching

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

Q. ABC is an equilateral triangle with side length 6. If X is a point on side CA , what is the minimum value of BXÂ² + XCÂ² ? Answer: Let's D is mid point of CA (BD = height = 3√3) So, Bx^2 + Cx^2 = (3√3)^2 + Dx^2 + Cx^2 = 27 + Dx^2 + Cx^2 So minima = 27 + 2Dx.Cx (from... read more

Q. ABC is an equilateral triangle with side length 6. If X is a point on side CA , what is the minimum value of BXÂ² + XCÂ² ?

Answer: Let's D is mid point of CA (BD = height = 3√3)

So, Bx^2 + Cx^2 = (3√3)^2 + Dx^2 + Cx^2 = 27 + Dx^2 + Cx^2

So minima = 27 + 2Dx.Cx (from AM GM)

Now (Dx + Cx) = 3

DX^2 +CX^2 = (9-2DX.CX)

2Dx.Cx = 9-2Dx.Cx

2Dx.Cx = 9/2

Ans: 27+9/2 = 63/2

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Comments Asked on 08 Feb CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

Explain why 7 ? 11 ? 13 + 13 and 7 ? 6 ? 5 ? 4 ? 3 ? 2 ? 1 + 5 are composite numbers.

Answer

Looking for Class IX-X Tuition

Find best Class IX-X Tuition in your locality on UrbanPro.

Answered on 01 Feb CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

The adjacent sides of a rectangle are 16 cm and 8 cm. Find the area of the rectangle.

Esther Y

Length=16c.m Breadth=8c.m Area =l*b=16*8=128cm sq

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Answers 20 Comments Answered on 02 Feb CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

How many triangles can be drawn having its angles as 45 , 64 and 72 ? Give reason for your answer.

Sujoy D.

Tutor

Zero triangles.. we cant draw triangle with these angles. but the given angles are 45,64.72. if we add those we get 45+64+72=181. so we cannot draw triangle.

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Answers 15 Comments Answered on 02 Feb CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

If the radius of a sphere is 2 r, then what is its volume?

Sujoy D.

Tutor

Volume of the sphere =( 4/3 π r3 ) cubic unit, If r = 2r then, Volume of the sphere: = [4/3 π(2r)3] = [4/3π × 8r3] = 32/3 π r3.

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Answers 16 Comments Looking for Class IX-X Tuition

Find best Class IX-X Tuition in your locality on UrbanPro.

Answered on 27 Jan CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

The mean of 10, 15, x, 5, 15 is 15. What is the value of x?

Atish Kumar Roy

Math Magician

Mean=sum of all observations÷total no. of observations 15 = (10+15+X+5+15) ÷ 5 75 = 45 + X X = 75 - 45 X = 30 So x is 3

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Answers 9 Comments Answered on 06/12/2017 CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

Find the area of a right-angled triangle whose base is 12 cm and height is 5 cm.

Rajesh Kumar Regar

30cm^2

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Answers 12 Comments Answered on 10 Feb CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

Ashish Jain

Maths Tutor

p = (30/50) = 3/5

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Answers 8 Comments Looking for Class IX-X Tuition

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Answered on 14/12/2017 CBSE/Class 9/Mathematics Tuition/Class IX-X Tuition

Balaji Puppala

Tutor

Let a be the one of the given triangle Let a+10, a+20 be another two angles a+a+10+a+20=180 3a+30=180 3a=150 a=50 50, 60, 70 are the required angles

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Answers 5 Comments 2 UrbanPro.com helps you to connect with the best Class IX-X Tuition in India. Post Your Requirement today and get connected.

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