Question

Two pipes can fill a tank in 150 and 100 minutes
and a waste pipe can carry off 1 L per minute. Ifall
the pipes are opened when cistern is full it is emptied
in 2 hrs. how many liters can cistern hold
(a) 40
(b) 36
(c) 48
(d) 60​

Answer 1

Answer:

A - 40 Litres.

Step-by-step explanation:

Pipe A in 2hrs can fill  120/150 = 0.8 times capacity of cistern

Pipe B in 2 hrs can fill 120/100 = 1.2 times capacity of cistern.

Tank was full when all the three pipes were opened. So, pipe C emptied liquid equal to 0. 8 + 1.2+1 = 3 times the capacity of the cistern in  2hrs.

3 times the capacity of cistern = 1 * 120

capacity of cistern = 120/3 = 40 Litres.

Answer 2

Answer:

OK ask me later and dont