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6.
If a man can read 15 pages in 2 hours, how many pages he can read in 6 hours?
  • A.
    60
  • C.
    45
  • B.
    50
  • D.
    40
  • Answer & Explanation
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Answer : [C]
Explanation :
Hours   Pages
2 15
6 | x
x =
6 x 15
2
 = 45 Pages  
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7.
8 men and 12 children can do a work in 9 days. A child takes double the time to do a work than the man. In how many days 12 men can complete double the work?
  • A.
    10.5 days
  • C.
    21 days
  • B.
    16.5 days
  • D.
    14 days
  • Answer & Explanation
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Answer : [C]
Explanation :
1 man = 2 children
(   A child takes double the time to do a work than a man)    
8 men + 12 children = 8 + 6 men = 14 men
Given, 14 men can do a work in 9 days
 
12 men can do the same work in
14 x 9
12
 days  
 
12 men can do twice the work in
14 x 9
12
 x 2 = 21 days  
 
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8.
8 men working for 9 hours a day complete a piece of work in 20 days. In how many days can 7 men working for 10 hours a day complete the same piece of work?
  • A.
    20 4  days
    7
  • C.
    21 3  days
    7
  • B.
    20 1  days
    2
  • D.
    20 2  days
    7
  • Answer & Explanation
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Answer : [A]
Explanation :
Men   Hours   Days
8 | 9 | 20
7 10 x
 
x =
8 x 9 x 20
7 x 10
=
144
7
 = 20
4
7
 days.
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9.
A can do a work in 6 days and B in 9 day. How many days will both take together to complete the work?
  • A.
    7.5
  • C.
    3.6
  • B.
    3
  • D.
    5.4
  • Answer & Explanation
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Answer : [C]
Explanation :

(A + B)'s 1 day work =

1
6
+
1
9
=
3 + 2
18
=
5
18
 
 
They complete the work in
18
5
 = 3.6 days  
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10.
A can do of work in 5 days. B can do 3/5 of the same work in 9 days and c can do 2/3 of that work in 8 days. In how many days can three of them together do the work?
  • A.
    5
  • C.
    4.5
  • B.
    4
  • D.
    3
  • Answer & Explanation
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Answer : [B]
Explanation :
A can do 1 work in 10 days
B can do 1 work in
9 x 5
3
 = 15 days  
C can do 1 work in
8 x 3
2
 = 12 days  
(A+B+C)'s 1 day work =
1
10
+
1
15
+
1
12
=
6 + 4 + 5
60
=
15
60
=
1
4
 
 
They complete the work in 4 days  
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