exam
Maths Puzzle
A can do piece of work in 30 days while B alone can do it in 40 days. In how many days can A and B working together do it?
A.
16
1
7
B.
17
1
7
C.
18
1
7
D.
19
1
7
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exam Other Question
A, B and C start simultaneously from X to Y. A reaches Y, turns back and meet B at a distance of 11 km from Y. B reached Y, turns back and meet C at a distance of 9 km from Y. If the ratio of the speeds of A and C is 3:2, what is the distance between X and Y?
A.
99 m
B.
100 m
C.
120 m
D.
142 m
To complete a piece of work A and B take 8 days, B and C 12 days. A, B and C take 6 days. A and C will take :
A.
7 Days
B.
7.5 Days
C.
8 Days
D.
8.5 Days