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Rajesh Babu

· started a discussion

· 1 Months ago

Wrong solution (Question: 121747.0 )

Ans is 80/7. While the solution i.e. option B is 35/3

Question:
If 1 man or 2 women or 4 boys can do a piece of work in 20 days. Then 1 man, 1 woman and 1 boy, working together can do it in-
Options:
A) 15\(\cfrac{2}{3}\) days
B) 11\(\cfrac{3}{7}\) days
C) 14\(\cfrac{3}{7}\) days
D) 16\(\cfrac{1}{7}\) days
E) None of these
Solution:

Ans: (b) 1 man = 2 women = 4 boys

(1 man + 1 women + 1 boy)

= (4 + 2 +1) = 7 boys

4 boys can do it in 20 days

7 boys can do it in

(20 × 4 × \(\cfrac{1}{7}\)) = \(\cfrac{80}{7}\Rightarrow\) 11\(\cfrac{3}{7}\) days

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