18 men can complete a piece of work in 5 days. In how many days can 21 men complete the same piece of work?
(a) 3 17/21 (b) 4 2/7 (c) 4 (d) Cannot be determined (e) None of these
Answered Feb 05, 2023
(b) 18 men can complete the work in 5 days. ?
1 man will complete the work in 18 × 5 days
21 men will do the work in 18x5/21 =30/7 =4 2/7 days.
B alone finish work in x days A alone work in x - 5 A one day works= 1/(x-5) and B one day works = 1/x A+B one day work = 1/6 so, 1/(x-5)...
(c) Here, 5 men out of 8 men and 6 women out of 10 women can be chosen in 8C5 × 10C6 ways, i.e., 11760 ways.
Since Ram is twice as good, he will do the work in 30/2 =15 days
(c) Number of days = 12x8/12-8 = 24 days
(e) Required number of days = 6x12 /6+12 = 4 days
(a) 112 men can complete the whole work in 8 × 3 = 24 days Required no. of days = 12x24/16= 18
(d) Required no. of days =9800/350= 28 days
(c) Suresh, working alone for 42 days = 1 unit of work. Mahesh is 1/5 times more efficient than Suresh. So Mahesh is 6/5 times as efficient as Suresh. Hence...
(d) W can do 25% of a work in 30 days. W can do1/4of a work in 30 days W can do the complete work in 120 days. X can do1/4of the work...
(b) Total number of working day = 50 × 50 = 2500 days for men For women it is equal to 4000 days For 1st 10 day means 40 men × 10...
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