Time and Work Problems (Easy)

Try to solve the following time and work questions using time and work formula:
Q.1.Ram is twice as efficient as Sunita and can finish a piece of work in 25 days less than Sunita. Sunita can finish this work in how many days?
a) 45 Days
b) 30 Days
c) 90 Days
d) 25 Days
e) 50 Days
Q.2. A can do a piece of work in 10 days, and B can do the same work in 20 days. With the help of C, they finished the work in 4 days. C can do the work in how many days, working alone?
a) 10 Days
b) 20 Days
c) 30 Days
d) 40 Days
e) 50 Days
Q.3. Chetan is thrice as efficient as Mamta and together they can finish a piece of work in 60 days. Mamta will take how many days to finish this work alone?
a) 80 Days
b) 160 Days
c) 240 Days
d) 320 Days
e) 400 Days
Q.4.Mr. Ram has a sum of money, which is sufficient to pay Usha's wages for 30 days and Manika's wages for 60 days. If he employs them together, the money is sufficient to pay their wages for how many days?
a) 12 Days
b) 10 Days
c) 30 Days
d) 20 Days
e) 36 Days
Q.5.X can do a piece of work in 20 days. He worked at it for 5 days and then Y finished it in 15 days. In how many days can X and Y together finish the work?
a) 10 Days
b) 15 Days
c) 18 Days
d) 24 Days
e) 32 Days
Q.6.X can do a piece of work in 30 days. Y can do it in 20 days, and Z can do it in 24 days. In how many days will they all do it together?
a) 6 Days
b) 5 Days
c) 4 Days
d) 4 2/3 Days
e) 8 Days
Q7.M and N can do a piece of work in 8 days and O can do it in 24 days. In how many days will M, N, and O do it together?
a) 6 Days
b) 5 Days
c) 4 Days
d) 4 2/3 Days
e) 3 Days
Q8.One man can paint a house in, '10' days and another man can do it in 15 days. If they work together, they can do it in 'd' days, then the value of 'd' is
a) 6 Days
b) 8 Days
c) 12 Days
d) 10 Days
e) 3 Days
Q9.A can do a piece of work in 9 days and B in 18 days. They begin together, but A goes away three days before the work is finished. The work lasts for
a) 6 Days
b) 8 Days
c) 12 Days
d) 10 Days
e) 3 Days
Q10.It takes 'h' hours to mow a lawn. In one hour what part of the lawn is mowed?
a) h - 1
b) 1 - h
c) 1 / h
d) h / (1 + h)
e) h