- 1. A can do a work in 60days and B in 12 days.Then A and B together do the work in,how many days?

A.5 days

B.4 days

C.10 days

D.2 days

Answer & Explanation

Answer: Option C

Explanation:A's 1day's work = 1/60

B's 1day's work = 1/12

They work together = 1/60 + 1/12 = 10 days

- 2. A and B together can do a work In 4 days. A alone can do it in 12days.what time B will take to do the work alone?

A.6 days

B.8 days

C.12 days

D.10 days

Answer & Explanation

Answer: Option A

Explanation:**A and B 1day's work = 1/4**

**A alone can do**

**1day's work = 1/12**

**what time B will take to do the work alone?**

B = (A+B) - A = (1/4) - (1/12) = 6 Days

B = (A+B) - A = (1/4) - (1/12) = 6 Days

- 3. A can do a work in 24 days and B can do it in 8 days. In how many days A and B can do the work?

A.20 days

B.10 days

C.6 days

D.8 days

Answer & Explanation

Answer: Option C

Explanation:A's 1day's work = 1/24

B's 1day's work = 1/8

They work together = 1/24 + 1/8 = 6 days

- 4. A can do a work in 30 days, B can do it in 20 days. They together under took to do a piece of work for Rs.1000, what is the share of B?

A.Rs.500

B.Rs.400

C.Rs.800

D.Rs.600

Answer & Explanation

Answer: Option D

Explanation:Share of their work days = 30:20

Share of their work =20:30

Share of B’s money = 3/5*1000 =600

- 5. A and B can do a piece of work in 40 days and 50 days respectively. They work together for 10 days and B leaves. In how many days the whole work is completed?

A.28 days

B.60 days

C.20 days

D.30 days

Answer & Explanation

Answer: Option A

Explanation:(A+B)’s 10 days work = 10[1/40+1/50]=10[5+4/200]= 9/20

A complete remaining work in 9/20*40 = 18

Total work = 10+18 = 28days

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