Multiple Choice QuestionsA school has 8 periods of 45 min each, every day. How long will each period be if the school has to have 9 periods everyday, assuming the working hours to be the same?
40 min
35 min
30 min
45 min
A can do a piece of work in 20 days and B in 15 days. With help of C, they finish the work in 5 days. C can alone do the work in
5 days
6 days
10 days
12 days
A and B together can do a piece of work in 36 days, B and C together can do it in 24 days. A and C together can do it in 18 days. The three working together can finish the work in
8 days
16 days
30 days
32 days
A certain number of men can do a piece of work in 60 days. If there were 6 men more, the work can be finished 20 days earlier. The number of men working is
6
12
18
24
24 men can do a piece of work in 17 days. How many men will be able to do it in 51 days?
8
10
12
6
A can do a piece of work in 8 days and B can do it in 10 days separately. How many days would it take for both A and B to finish the same work together?
If 5 men or 7 women can earn ₹ 5250 per day, how much would 7 men and 13 women earn per day?
₹ 11600
₹ 11700
₹ 16100
₹ 17100
If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work?
60
45
40
30
A can complete a piece of work in 18 days, B in 20 days and C in 30 days. B and C together start with the work and are forced to leave after 2 days. The time taken by A alone to complete the remaining work is
10 days
12 days
15 days
16 days
C.
15 days
B's work in one day 
C's work in one day 
(B + C)'s work in one day:
"
(B + C)'s work in two days
Now, rest of the work
A does one work in 18 days
∴ A does 
work in:
A and B can complete a piece of work in 8 days. B and C can do it in 12 days, C and A can do it in 8 days. A, B and C together can complete it in
4 days
5 days
6 days
7 days
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