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Practice Questions on Time and work :
Q1. A can do a piece of work in 10 days and
B can do it 20 days. How many days will both
take together to complete the work?
a) 15 b) 24/5 c) 20/3 d) 30
Q2. A and B can do a work in 12 days, B and
C in 15 days and C and A in 20 days. If A,
B and C work together, they will complete the work in:
a) 5 days b) 8 days c) 10 days d) 9 days
Q3. A and B can do a work in 18 and 24 days respectively.
They worked together for 8 days and then A left.
The remaining work was finished by B in:
a) 5 days b) 16/3 days c) 8 days d) 10 days
Q4. A can do a piece of work in 12 days and B can do
it in 18 days. They work together for 2 and then
A leaves. How long will B take to finish the remaining work?
a) 6 days b) 8 days c) 10 days d) 13 days
Q5. A and B working separately can do a piece of work
in 10 days and 15 days respectively. If they work on
alternate days beginning with A, in how many days
will the work be completed
a) 18 days b) 13 days c) 12 days d) 6 days
Q6. If 6 men and 8 boys can do a piece of work in 10 days
and 26 men and 48 boys can do the same in 2 days,
the time taken by 15 men and 20 boys to do
the same type of work will be:
a) 5 days b) 4 days c) 6 days d) 7 days
Q7. 5 persons can prepare an admission list
in 8 days working 7 hours a day. If 2 persons
join hem so as to complete the work in 4 days,
they need to work per day for
a) 10 hours b) 9 hours c) 12 hours d) 8 hours
Answers
1c 2c 3b 4d 5c 6b 7a
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