exam
Maths Puzzle
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
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exam Other Question
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
Two pipes can fill the cistern in 10hr and 12 hr respectively, while the third empty it in 20hr. If all pipes are opened simultaneously, then the cistern will be filled in
A.
7.5 hr
B.
8 hr
C.
8.5 hr
D.
10 hr