Question

On a blueprint, a circular swimming pool has a radius of 5 inches, while the actual swimming pool to be built has a proposed radius of 20 feet.
If another swimming pool is to be built with a radius of 24 feet, what will be its diameter on the same plan?

(A6\ inches (B 9 (C12 (D18 (A) 6 inches (B) 9 inches (C) 12 inches (D) 18 inches

Answer 1

The radius on the plan is 6 feet, hence the diameter will be

diameter on plan  = 6*2 = 12 feet

Mensuration of Flat Shapes(circle)

Given Data

First pool

Radius of pool on Plan/Blue Print = 5 inches

actual Radius = 20 feet

Second pool

Radius of pool on Plan/Blue Print = ???

actual Radius = 24 feet

From the first pool, we can see that the Proposed Radius is 4 time the Planned radius

Hence, for the second pool let us apply similar logic

Actual radius = 4*x

24 = 4x

divide both sides by 4

x = 24/4

x = 6 feet

Diameter = 6*2 = 12 feet

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