Two pipes A and B can fill a tank in $20$ and $30$ minutes respectively. If both the pipes are used together, then how long it will take to fill the tank?

11

mins

No worries! We‘ve got your back. Try BYJU‘S free classes today!

12

mins

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

13

mins

No worries! We‘ve got your back. Try BYJU‘S free classes today!

15

mins

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $12$ mins
Part filled by A in $1$ min $= \frac{1}{20}$
Part filled by B in $1$ min $= \frac{1}{30}$
Part filled by $(\begin{matrix} A + B \end{matrix})$ in $1$ min $= \frac{1}{20} + \frac{1}{30} = \frac{1}{12}$
So both pipes can fill the tank in $12$ mins.

Suggest Corrections

Similar questions

Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

Q. Two pipes A and B can fill a tank in 15 and 30 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

Q. Two pipes

A

and

B

can fill a tank in

20

and

30

minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

Two pipes P and Q can fill a tank in 36 mins and 45 mins each. A third pipe R can empty the tank in 30 mins. Initially, P and Q are opened and after 7 mins, R is also opened. How long will it take for the tank to fill up?

Q. Two pipes A and B can fill a cistern in 20 min and 25 min respectively. Both the pipes are opened together, but at the end of 5 min the first is turned off. How long does it take to fill the cistern ?

Join BYJU'S Learning Program

Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long it will take to fill the tank?

The correct option is C 12 minsPart filled by A in 1 min =120Part filled by B in 1 min =130Part filled by (A+B) in 1 min =120+130=112So both pipes can fill the tank in 12 mins.

Two pipes A and B can fill a tank in $20$ and $30$ minutes respectively. If both the pipes are used together, then how long it will take to fill the tank?

The correct option is C $12$ mins
Part filled by A in $1$ min $= \frac{1}{20}$
Part filled by B in $1$ min $= \frac{1}{30}$
Part filled by $(\begin{matrix} A + B \end{matrix})$ in $1$ min $= \frac{1}{20} + \frac{1}{30} = \frac{1}{12}$
So both pipes can fill the tank in $12$ mins.