"Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty
Channel: Doubtnut
Date: 2020-04-05

"Two pipes can fill a tank in 20 and 24 minutes
 respectively and a waste pipe can
 empty 3 gallons per minute. All the three pipes working together can fill the
 tank in 15 minutes. The capacity of the tank is 
`60\ ga l lon s`
b. `100\ ga l lon s`

c. `120\ ga l lon s`
d. `180\ ga l lon s`"