Advertisements
Advertisements
Question
A can do a piece of work in 10 days and B in 15 days. How long will they take together to finish it?
Solution
A's 1-day work =`1/10`
B's 1-day work =`1/15`
(A + B)'s 1-day work =`1/10+1/15`
`=(3+2)/30=5/30`
`=1/6`
∴ Both A and B together can finish the work in = 6 days
APPEARS IN
RELATED QUESTIONS
A train is moving with a uniform speed of 120 km per hour.
(i) How far will it travel in 36 minutes?
(ii) In how much time will it cover 210 km?
Cost of 24 identical articles is Rs. 108, Find the cost of 40 similar articles.
If 12 men or 18 women can complete a piece of work in 7 days, in how many days can 4 men and 8 women complete the same work?
Twelve typists, all working with the same speed, type a certain number of pages in 18 days working 8 hours a day. Find, how many hours per day must sixteen typists work in order to type the same number of pages in 9 days?
A can do a work in 15 days and B in 20 days. If they together work on it for 4 days; what fraction of the work will be left?
A and B working together can mow a field in 56 days and with the help of C, they could have mowed it in 42 days. How long would C take by himself?
A and B complete a piece of work in 24 days. B and C do the same work in 36 days; and A, B, and C together finish it in 18 days. In how many days will:
(i) A alone,
(ii) C alone,
(iii) A and C together, complete the work?
P and Q can do a piece of work in 12 days and 15 days respectively. P started the work alone and then after 3 days, Q joined him till the work was completed. How long did the work last?
P alone can do `1/2` of a work in 6 days and Q alone can do `2/3` of the same work in 4 days. in how many days will they finish `3/4` of the work, working together?
X alone can do a piece of work in 6 days and Y alone in 8 days. X and Y undertook the work for ₹ 48000. With the help of Z, they completed the work in 3 days. How much is Z’s share?
