Two pieces A and B can fill a tank in 18 hrs and 6 hrs respectively. If both the pipes are opened simultaneously how much time will be taken to fill the tank? `4 1/2h r s` b. `7\ h r s` c. `6\ h r s` d. `10\ h r s`

Two pipes A and B can fill a tank in 18 h and 12 h, respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?

Two pipes A and B can fill a tank in 45 hours and 36 hours, respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank ?

Two pipes A and B can fill a tank in 18 and 6h , respectively . If both the pipes are opened simultaneously , how much time will be taken to fill the tank?

Two pipes A & B can fill a tank in 36 hours and 45 hours respectively. If both the pipes are opened simultaneously. How much time will be taken to fill the tank?

Two pipes A and B can fill a tank in 12 minutes and 18 minutes respectively. If both the pipes are opened simultaneously, how long will they take to fill the tank ?

Pipes A and B can fill a tank in 5 hours and 20 hours respectively. If both pipes are opened then, how much time (in hours) it will take to fill the tank?

A pipe can fill a tank in 5 h, while another pipe can empty it in 6 h. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?

Two pipes A and B can fill a tank in 24h and 30 h respectively. If both the pipes are opened simultaneously in the empty tank, how much time will be taken by them to fill it? 13 h 20 m in b. 12 h 10 m in c. 14 h d. 10 h 5 m in