1000+ Amhara Bank Exam Questions and Answers Pdf - 1
Question: 1
A alone can complete a piece of work in 8 days. Work done by B alone in one day is half of the work done by A alone in one day. In how many days can the work be completed if A and B work together?
(A) $$5{1}/{2}$$
(B) $$5{1}/{3}$$
(C) $$6{1}/{2}$$
(D) $$6{1}/{3}$$
Ans: B
A does the work in 8 days.
B does the work in 16 days.
∴ A + B do the work in $${8 × 16} / {8 + 16}$$ = $${16}/{3}$$ = $$5{1}/{3}$$ days.
Question: 2
A can complete a piece of work in 12 days. A and B together can complete the same piece of work in 8 days. In how many days can B alone complete the same piece of work?
(A) 15 days
(B) 16 days
(C) 18 days
(D) 24 days
Ans: D
Work of A for 1 day = $${1}/{2}$$
Work of (A + B) for 1 day = $${1}/{8}$$
∴ Work of B for 1 day = $${1}/{8} – {1}/{12}$$ = $${1}/{24}$$
∴ B alone can complete the same work in 24 days.
Question: 3
15 men can do a piece of work in 6 days. How many men would be required to do the same work in 7.5 days?
(A) 10
(B) 12
(C) 16
(D) 18
Ans: B
Required men = $$15({6}/{7.5})$$ = 12.
Question: 4
A can complete a piece of work in 12 days. A and B together can complete the same piece of work in 4 days. In how many can B alone complete the same piece of work?
(A) 2 days
(B) 6 days
(C) 10 days
(D) 12 days
Ans: B
Suppose the work consists of making 12 pillars. Since A can complete the work in 12 days, this implies that A can make one pillar in a day. Similarly, we get that A and B together can make three pillars in a day. Hence we can conclude that ‘B’ can make two pillars in a day. Hence, the total work (12 pillars) can be completed by B in (12 &divde; 2) = 6 days.
Question: 5
A and B can together finish a work in 30 days. They worked together for 20 days and then B left. After another 20 days A finished the remaining work. In how many days can A alone finish the job?
(A) 50 days
(B) 60 days
(C) 70 days
(D) 80 days
Ans: B
A and B together do $${20}/{30}$$ = $${2}/{3}$$ part of the work in 20 days.
Remaining work = $$1 - {2}/{3}$$ = $${1}/{3}$$
∴ A alone can do the work in 20 × 3 = 60 days.
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