Question

Five pipes of the same size fill an oil tank in 1 hour 30 minutes. How long will 12 pipes of the same size
take to fill the tank?​

Answer 1

Answer:

37.5 minutes

Step-by-step explanation:

5 pipes fill a tank in 1 hour and 30 minutes = 90 minutes

then 1 pipe can fill it in 90 * 5 = 450 minutes

then for 12 pipes to fill the tank it is = 450/12 = 37.5 minutes