Question

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

Answer 1

Answer:

48 minutes

Step-by-step explanation:

Speed of flow: 20m/min or 200cm/min

Radius of the pipe : 2cm

Volume of water in the pipe in one minute:  π * r^2 * h = π * (2^2) * 200 = 800π

Volume of cone : π * r^2 * h /3 = π * (40^2) * 72/3 = 38400π

Therefore, total time : 38400π / 800π = 48 minutes