What is the height in (m) of a conical water tank having radius of 70 m and volume of 46,200 m3 ? ( take pi = 22/7 )
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 9
We are given:
Volume, V = 46,200 m3
Radius, r = 70 m
Volume =1/3πr2h
⇒ 1/3 × 22/7 × 70 × 70 × h = 46200
⇒ 46,200 = 1/3 × 22/7 × 4900 × h
⇒ (46200 × 7 × 3)/(4900 × 22) = h
⇒ h = 9
The height of the conical water tank = 9 m