Question

A cylindrical pipe has inner diameter 4 cm and water flows through it at the rate of 20m per minute.how long would it take to fill a conical tank of radius 40cm and depth 72cm

Answer 1

Flowing rate of water=20m/minute
changes into cm=2000cm/minute
Vol of water in 1 minute=π*2*2*2000cm^3
Radius of tank=40cm
Depth=72cm
Vol of tank=1/3(π * 40 * 40 * 72)cm^3
Time to fell the tank=(π * 40 * 40 * 72)/(π * 2 * 2 * 2000 * 3)
= 4 min + .8*60 secs
=4mins and 48 seconds.