Question

Two pipes can fill a tank in

1

37

2

minutes and 45

minutes respectively. Both are opened together. Af-

ter working at it together for some time B is closed

then the tank is filled in half an hour. After what time

will the pipe B have turned of.​

Answer 1

Answer:

Two pipes can fill a tank in 20 to 25 minutes

Answer 2

According to question,

cistern fills in 30 minutes  

So pipe A worked for 30 minutes

It filled = 30 × 6 = 180 units

Remaining capacity = 225 − 180 = 45 units

So this remaining capacity must be filled by B

B must have filled it in $\frac{45}{5}$ = 9 min.

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