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Reasoning - Mock Test 70

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Question 691

A can do a piece of work in 7 days of 9 hours each, and B can do it in 6 days of 7 hours each. How long will they take to do it, working together 8 2/5 hours a day?

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Question 692

A and B and C together can finish a piece of work in 4 days. A alone can do it in 12 days, and B in 18 days. Then, C alone can do it in?

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Question 693

A is twice as good workman as B, and together they complete a work in 15 days. In how many days can the work be complete by B alone?

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Question 694

12 men can complete a work in 18 days. Six days after they started working, 4 more men joined them. How many days will all of them together complete the remaining work?

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Question 695

A,B and C are employed to do apiece of work for Rs.529. A and C are supposed to finish 19/23 of the work together. How much shall be paid to B?

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Question 696

A can do a piece of work in 80 days. He works at it for 10 days & then B alone finishes the remaining work in 42 days. In how much time will A and B, working together, finish the work?

Work done by A in 10 days=10/80=1/8 Remaining work=(1-(1/8))=7/8 Now, work will be done by B in 42 days. Whole work will be done by B in (42*8/7)=48 days Therefore, A's one day's work=1/80 B’s one day's work=1/48 (A+B)'s one day's work=1/80+1/48=8/240=1/30 Hence, both will finish the work in 30 days.

Question 697

A can do a piece of work n 7 days of 9 hours each and B alone can do it in 6 days of 7 hours each. How long will they take to do it working together 8 2/5 hours a day?

A can complete the work in (7*9) = 63 days B can complete the work in (6*7) = 42 days --> A’s one hour’s work = 1/63 and B’s one hour work = 1/42. (A+B)’s one hour work = 1/63+1/42 = 5/126 Therefore, Both can finish the work in 126/5 hours. Number of days of 8 2/5 hours each = (126*5/(5*42)) = 3 days

Question 698

X can do ¼ of a work in 10 days, Y can do 40% of work in 40 days and Z can do 1/3 of work in 13 days. Who will complete the work first?

Whole work will be done by X in 10*4 = 40 days. Whole work will be done by Y in (40*100/40) = 100 days. Whole work will be done by Z in (13*3) = 39 days Therefore, Z will complete the work first.

Question 699

A is twice as good a workman as B and together they finish a piece of work in 18 days. In how many days will A alone finish the work?

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Question 700

f 9 men working 6 hours a day can do a work in 88 days. Then 6 men working 8 hours a day can do it in how many days?

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