Time and Work MCQ Set 2

Showing question 6 to 10 of total 20 MCQs

Solve the question on your notebook and check it by clicking (Answer and Explanation) below question.

Question No: 6

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 B alone finish the work.

1. 27 days
2. 54 days
3. 56 days
4. 68 days

Answer: B

Explanation

As per question, A do twice the work as done by B.

So A:B = 2:1

Also (A+B) one day work = 1/18

To get days in which B will finish the work, lets calculate work done by B in 1 day =

[Please note we multiplied by 1/3 as per B share and total of ratio is 1/3]

So B will finish the work in 54 days

Question No: 7

A man can do a piece of work in 5 days, but with the help of his son he can do it in 3 days. In what time can the son do it alone ?

Answer: A

Explanation

In this type of question, where we have one person work and together work done.

Then we can easily get the other person work just by subtracting them. As,

Son's one day work =

Question No: 8

A can do a job in 16 days, B can do same job in 12 days. With the help of C they did the job in 4 days. C alone can do the same job in how many days ?

Answer: D

Explanation

In this question we having, A's work, B's work and A+B+C work. We need to calculate C's work. We can do it by, (A+B+C)'s work - (A's work + B's work). Let's solve it now: C's 1 day work =

Question No: 9

To complete a work A and B takes 8 days, B and C takes 12 days, A,B and C takes 6 days. How much time A and C will take

1. 24 days
2. 16 days
3. 12 days
4. 8 days

Answer: D

Explanation

A+B 1 day work = 1/8 B+C 1 day work = 1/12 A+B+C 1 day work = 1/6 We can get A work by (A+B+C)-(B+C) And C by (A+B+C)-(A+B) So A 1 day work =

Question No: 10

A does half as much work as B in three-fourth of the time. If together they take 18 days to complete the work, how much time shall B take to do it

1. 40 days
2. 35 days
3. 30 days
4. 25 days

Answer: C

Explanation

Suppose B takes x days to do the work.

As per question A will take

(A+B)s 1 days work= 1/18

1/x + 2/3x = 1/18 or x = 30 days