Question

5 pipes can fill a tank in 1 hour 38 minutes . How long will it take for 7 such pipes to fill the tank? ​

Answer 1

Step-by-step explanation:

5 tanks = 60+38= 98 min

it's an inverse proportion

5×98=7x

490=7x

70=x

70min = 1 hour 10 min

Therefore, 7 pipes would take 1 hour and 10 minutes to fill the tank