Time and work

A Can do a piece of work in 15 days. A and B together can complete the work in 12 days. B alone can do it in-

• 50 days

• 60 days

• 45 days

• 40 days

Tags

CCSS.HSA.CED.A.1

6 men or 8 boys can do a work in 12 days. Then 6 men and 4 boys together can do the work in how many days?

• 9 days

• 8 days

• 15 days

• 6 days

Tags

CCSS.8.EE.C.7B

A can complete a work in 15 days and B can do the same work in 20 days. After doing 3 days, A leaves the work. Find in how many days we will do the remaining work?

• 10 days

• 12 days

• 15 days

• 16 days

Tags

CCSS.HSA.CED.A.1

A certain number of men can do a work in 30 days. If there were 10 men more it would be finished in 10 days less .how many men are there originally?

• 25 men

• 20 men

• 15 men

• 30 men

A is 4 times as fast as B and is therefore able to finish a work in 30 days less than B. Find the time in which they can do it working together.

• 12 days

• 16 days

• 8 days

• 20 days

Tags

CCSS.HSA.CED.A.1

A, B and C can do a piece of work in 12, 15 and 20 days respectively. They all together will complete the work in__

• 4 days

• 7 days

• 5 days

• 8 days

Tags

CCSS.8.EE.C.7B

120 men can do a piece of work in 50 days. They started the work but after 20 days, another 30 men are employed. In how many days the remaining work be completed?

• 25 days

• 20 days

• 24 days

• 21 days

Tags

CCSS.HSA.CED.A.1

A can do a work in 18 days. B is 20% more efficient than A. In how many days B alone can do the same work?

• 12 days

• 16 days

• 10 days

• 15 days

Tags

CCSS.8.EE.C.7B

B and C complete 7/9 th of the work and remaining by A.If they got Rs. 450 for the work,find the share of A

• 100

• 150

• 200

• 75

Tags

CCSS.8.EE.C.7B

A can do a work in 20 days,B can do it in 25 days.They started the work together but B left the work 2 days before the work is finished.In how many days the work will be finished?

• 10 days

• 15 days

• 12 days

• 16 days

Tags

CCSS.HSA.CED.A.1