A tank can be filled with waterby two pipes, A and B together in36 min

1.	A tank can be filled with waterby two pipes, A and B together in36 minutes. If the pipe B wasstopped after 30 minutes, the tankis filled in 40 minutes. The pipe Bcan alone fill the tank in
Answer» let(A+B)(A+B)fills 1 litre in 1 minutes then(A+B)(A+B)fills in 36 minutes = 36 litres According to question (A+B)(A+B)work only for 30 minutes then pipe filled by(A+B)(A+B)in 30 minutes is = 30 litres remaining part =(36−30)=6litres 6 litres part filled by A in =1/0 minutes 1 part filled by A=10/6minutes 36 part filled by A =10/6×36=60 minutes A+B=36minutes A=60 minutes A's efficiency = 3 litres/minute B's efficiency = 2 litres/minute. B can alone fill the tank in =T.CeffofB=180/2=90minutes

A tank can be filled with waterby two pipes, A and B together in36 minutes. If the pipe B wasstopped after 30 minutes, the tankis filled in 40 minutes. The pipe Bcan alone fill the tank in

Answer»

let(A+B)(A+B)fills 1 litre in 1 minutes then(A+B)(A+B)fills in 36 minutes = 36 litres

According to question

(A+B)(A+B)work only for 30 minutes then pipe filled by(A+B)(A+B)in 30 minutes is = 30 litres

remaining part =(36−30)=6litres

6 litres part filled by A in =1/0 minutes

1 part filled by A=10/6minutes

36 part filled by A =10/6×36=60 minutes

A+B=36minutes

A=60 minutes

A's efficiency = 3 litres/minute

B's efficiency = 2 litres/minute.

B can alone fill the tank in

=T.CeffofB=180/2=90minutes