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Dipak

· started a discussion

· 1 Months ago

not understand (Question:167457.0)

not understand

Question:

15 men or 18 women can complete a piece of work in 45 days. If 5 men and 6 women work together then the work will be completed in:

Options:
A) 48 days
B) 53 ½ days
C)  67 ½  days
D) 75 days
Solution:
Ans:(c) Time taken by 15 men = 45 days

Time taken by 5 men = (45 x 15)/5 = 135 days

Time taken by 18 women = 45 days

Time taken by 6 women = (45 x 18)/6 = 135 days

Required Time = 1/(1/135 + 1/135) = 135/2 = 67 ½ 

Knowledge Expert

· commented

· 1 Months ago

Dear student,
15M = 18W
5M = 6W
5M+6W=6W+6W
18W x 45 = 12W x n
(18 x 45)/12 = n
n = 135/2
n = 67.5 day

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