MEDIUM
8th Foundation
IMPORTANT
Earn 100

Three friends Priya, Usha and Spandana together can do a piece of work in 56 days. If Usha's ability to do the work is twice as that of Spandana and Priya's ability to do the work is twice as that of Usha, then find the number of days required for these friends to complete the same work if they work individually.

Important Questions on Time and Work, Pipes and Cisterns

EASY
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 29
Satish can do 15th of a work in 5 days, whereas he and Ramesh together can do 95th of the same work in 10 days. They start the work together and work for 5 days after which Satish leaves. Find the number of days in which Ramesh alone can finish the remaining work.(In days).
MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 30
A and B together can do a piece of work in 20 days , whereas B and C together can do the same work in 15 days. If A,B and C together can finish this work in 10 days, then find the number of days in which B alone can finish the work.(in days).
EASY
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 31
Three pipes X, Y, and Z  can fill a tank in 120 minutes. Pipe X is twice faster than pipeY, pipe Y is thrice faster than pipe Z. In how many hours can pipe Z fill the tank ?
MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 32
4 women and 3 men can do a piece of work in 2 days, whereas 6 women and 2 men can also finish it in 2 days. Now, find the time taken by one woman to complete the same job working alone. Also, find the time one man takes to complete the same job working alone.
 
MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 33
A tank has two inlet pipes, A and B, which can fill the tank in 12 h and 18 h, respectively, and an outlet C which can empty the tank in 9 h. A, B and C are all open at a time, but the outlet C is blocked completely after 6 h. Find the total time taken right from the start to fill the tank.
MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 34
A, B and C can do a work in 20,45 and 120 days, respectively. They started the work. A left 10 days before and B left  5 days before the completion of work. In how many days is the total work completed?(in days).
MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 35
Two pipes P and Q can fill a cistern in 15 min and 20 min, respectively. Both are opened together, but at the end of 5 min,  the pipe P is turned off. How long will the pipe Q take to fill the cistern?
EASY
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 8 - Time and Work, Pipes and Cisterns>PRACTICE QUESTIONS CLASSROOM WING>Q 36
A and B can do a piece of work in 12 days, B and C in 15 days and C and A in 20 days. In how many days can they do it, all working together?