Some tanks of capacity 720 liters are meant to be filled by three pipes of capacity of loading water at 50 liters, 25 liters, and 15 liters in 10 minutes respectively. In one day they together can fill -

Question: Some tanks of capacity 720 liters are meant to be filled by three pipes of capacity of loading water at 50 liters, 25 liters, and 15 liters in 10 minutes respectively. In one day they together can fill -

Solution:
in 10 minutes total fill-up = (50 + 25 + 15) = 90 liters

in 1 hour = 540 liters.
in 24 hours = (540 × 24) = 12960 liters.

total tank = 12960/720 = 18