A 15 m deep well with radius 2.8 m is dug and the earth taken out fro…

Question

A 15 m deep well with radius 2.8 m is dug and the earth taken out from it is spread evenly to from a platform of breadth 8 m and height 1.5 m. What will be the length of the platform? ( Take = 227 )

Accepted Answer

Option B. 30.8 m. Answer & Solution Answer: Option B Solution: & Volume of well = r^2h & = 227 × 2.8^2 × 15 & Volume of platform = 8 × 1.5 × x & Volume of platform = Volume of well & 8 × 1.5 × x = 227 × 2.8 × 2.8 × 15 & x = 30.8 m