51.
A certain number of persons can dig a trench 100 m long, 50 m broad and 10 m
deep in 10 days. The same number of persons can dig another trench 20 m broad
and 15 m deep in 30 days. The length of the second trench is:
[A]400
m
[B]500 m
[C]
800 m
[D]
900 m
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52.
If 9 examiners can examine a certain number of answer books in 12 days, working
5 hours a day; for how many hours a day would 4 examiners have to work in order
to examine twice the number of answer books in 30 days?
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[A]
6
[B]
8
[C]
9
[D] 10
53.
A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the
smaller wheel has made 21 revolutions, then the number of revolutions made by
the larger wheel is:
[A]
4
[B]
9
[C]
12
[D] 49
54.
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If 7
spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many
days?
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55.
A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the
building, which casts a shadow of length 28.75 m under similar conditions will
be:
A. 10 m B. 12.5 m
C. 17.5 m D. 21.25 m
56.
The cost of 16 packets of salt, each weighing 900 grams is Rs. 28. What will be
the cost of 27 packets, if each packet weighs 1 kg?
[A]
Rs. 52.50
[C]
Rs. 58.50
[B]
Rs. 56
[D]
Rs. 64.75
57.
If 12 carpenters, working.6 hours a day can make 460 chairs in 24 days,how many
chairs will 18 carpen’ters make in 36 days, each working 8hours a day ?. [Hotel
Mgt 1992]
A.1260 B.920
C.1320 D.1380
58.
If the wages of 6 men for 15 days be Rs.2100, then find the wages of
for
12 days.
59.
10 men, working 6 hours a day can complete a work in 18 days. How many hours a
day must 15 men work to complete the same work in 12 days?
[A]6
[C]
12
[B]10
[D]
15
60.
If 20 men can build a wall 66 metres long in 6 days, what length of a similar
can be built by 86 men in 8 days?
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