GENPACT Company Numerical Ability Time and Work

Two pipes A and B can fill a tank in 36 min. and 45 min. respectively. A water pipe C can empty the tank in 30 min. First A and B are opened. After 7 minutes, C is also opened. In how much time, the tank is full?

Read Solution (Total 1)

part filled in 7 min= 7*(1/36+1/45) =7/20
remaining part= 1-7/20 =13/20
net part filled by pipes A,B,C=(1/36+1/45-1/30) =1/60 (in 1 min.)
13/20 part is filled in = 60*13/20 =39 min
total time taken to fill the tank = 39+7 =46 min
ans = 46 min.
9 years agoHelpfull: Yes(4) No(3)

GENPACT Other Question

A is twice as good as workman as B and together they finish a piece of work in 18 days. In how many days will A alone finish the work? From a group of boys and girls 15 girls leave. There are then left 2 boys for each girl. After this, 45 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning.