49
Q:

A and B can do a work in 4 hours and 12 hours respectively. A starts the work at 6 AM and they work alternately for one hour each. When will the work be completed?

A) 4 days B) 5 days
C) 6 days D) 7 days

Answer:   C) 6 days



Explanation:

Work donee by A and B in the first two hours, working alternatively = First hour A + Second hour B = (1/4) + (1/12) = 1/3.

Thus, the total time required to complete the work  = 2 (3) = 6 days 

Q:

A, B and C can individually complete a piece of work in 24 days, 15 days and 12 days, respectively. B and C started the work and worked for 3 days and left. The number of days required by A alone to complete the remaining work, is:

 

A) 11 B) 15.5
C) 18 D) 13.2
 
Answer & Explanation Answer: D) 13.2

Explanation:
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1 31
Q:

A is 40% more efficient than B and C is 20% less efficient than B. Working together, they can complete a task in 20 hours. In how many hours will A alone complete 35% of that task?

 

A) 14 B) 15
C) 13 D) 16
 
Answer & Explanation Answer: D) 16

Explanation:
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0 55
Q:

The efficiencies of A, B and C are in the ratio of 2 : 3: 5. Working together, they can complete a task in 6 days. In how many days will A alone complete 20% of that task?

 

A) 4 B) 8
C) 5 D) 6
 
Answer & Explanation Answer: D) 6

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1 138
Q:

The efficiencies of A, B and C are in the ratio 2 : 5 : 3. Working together, they can compete a task in 9 days. In how many days will C alone complete 40% of that task?

 

A) 15 B) 14
C) 12 D) 16
 
Answer & Explanation Answer: C) 12

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2 224
Q:

A can finish a work in 20 days and B can finish the same work in 25 days. They begin together, but B left the work after 5 days. How many more days will A take to finish the remaining work?

 

A) 11 B) 8
C) 16 D) 21
 
Answer & Explanation Answer: A) 11

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1 279
Q:

A earns ₹180 per hour and works for 7 hours per day. B earns ₹160 per hour and works for 5 hours per day. What is the ratio of per day wages of A and B?

 

A) 40 : 61 B) 63 : 40
C) 20 : 30 D) 33 : 20
 
Answer & Explanation Answer: B) 63 : 40

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2 3316
Q:

If 100 cat kill 100 .mice in 100 days, then 4 cats would kill 4 mice in how many days?

A) 4 days B) 3 days
C) 40 days D) 100 days
 
Answer & Explanation Answer: D) 100 days

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7 750
Q:

Four men and 6 women can complete a certain piece of work in 5 days whereas three men and 4 women can complete it in 7 days.How many men should assist 25 women to complete 2.5 times the same work in 5 days?

 

A) 8 B) 10
C) 4 D) 5
 
Answer & Explanation Answer: D) 5

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6 789