Practice MCQ Questions and Answer on Time and Work
71.
Rosa can eat 32 rosogollas in one hour. Her sister Lila needs three hours to eat the same number. How much time will they take to eat 32 rosogollas together ?
- (A) 45 minutes
- (B) 75 minutes
- (C) 90 minutes
- (D) None of these
72.
If 6 women can complete a work in 3 days, and 9 girls can complete the same work in 2 days, then find the time taken to complete the same work by 8 women and 6 girls?
- (A) 3 days
- (B) 4 days
- (C) 6 days
- (D) $$\frac{9}{7}$$ days
73.
A 10 hectare field is reaped by 2 men, 3 women and 4 children together in 10 days. If working capabilities of a man, a woman and a child are in the ratio 5 : 4 : 2, then a 16 hectare field will be reaped by 6 men, 4 women and 7 children in = ?
- (A) 5 days
- (B) 6 days
- (C) 7 days
- (D) 8 days
74.
A contractor undertook to finish a work in 92 days and employed 110 men. After 48 days, he found that he had already done $$\frac{3}{5}$$ part of the work, the number of men he can withdraw so that his work may still be finished in time is ?
- (A) 45
- (B) 40
- (C) 35
- (D) 30
75.
P can complete $$\frac{1}{4}$$ of a work in 10 days, Q can complete 40% of the same work in 145 days. R, complete $$\frac{1}{3}$$ of the work in 13 days and S, $$\frac{1}{6}$$ of the work in 7 days. Who will be able complete the work first ?
- (A) P
- (B) Q
- (C) R
- (D) S
76.
A can do a work in 10 days. The efficiency of A is 20% less than B. How many days B need to finish the same work?
- (A) 8.5 days
- (B) 12.3 days
- (C) 8 days
- (D) 7.5 days
77.
A man and a boy together can do a certain amount of digging in 40 days. Their speeds in digging are in the ratio of 8 : 5. How many days will the boy take to complete the work if engaged alone ?
- (A) 52 days
- (B) 68 days
- (C) 80 days
- (D) 104 days
78.
A and B can do a piece of work in 25 days. B alone can do $$66\frac{2}{3}\% $$ ÃÂÃÂ of the same work in 30 days. In how many days can A alone do $$\frac{4}{{15}}$$ part of the same work?
- (A) 15
- (B) 20
- (C) 18
- (D) 12
79.
Two pipes A and B can fill a cistern in 12 min and 16 min respectively. Both the pipes are opened together for a certain time but due to some obstruction the flow of water was restricted to $$\frac{7}{8}$$ of full flow in pipe A and $$\frac{5}{6}$$ of full in pipe B. This obstruction is removed after some time and tank is now filled in 3 min from that moment. How long was it before the full flow.
- (A) 8 min
- (B) 3 min
- (C) 5.6 min
- (D) 4.5 min
80.
A and B can do a piece of work in 12 days, B and C in 8 days and C and A in 6 days. How long would B take to do the same work alone ?
- (A) 24 days
- (B) 32 days
- (C) 40 days
- (D) 48 days