# Pipes A. B and C can fill a tank in 30 h, 40 h and 60 h respectively.

| Pipes A. B and C can fill a tank in 30 h, 40 h and 60 h respectively. Pipes A, B and C are opened at 7 a. m. 8 a. m. and 10 a. m. respectively on the same day. When will the tank be full?

A. 9. 40 p. m.

B. 10. 20 p. m.

C. 9. 20 p. m.

D. 10. 00 p. m.

### Right Answer is: C

#### SOLUTION

Let the capacity of tank =LCM (30,40,60) unit

Tank filled by by A in an hour unit

Tank filled by by B in an hour unit

Tank filled by by C in an hour unit

Tank filled by A from 7 to 10 A. M. unit

Tank filled by B from 8 to 10 A. M. unit

Total work done by till 10 A. M. unit

Now, all the three pipes will work together

Required time

So, the tank will be full by 9 : 20 P. M.

Share

Pipes A. B and C can fill a tank in 30 h, 40 h and 60 h respectively.