Question

20. 2 men and 3 boys can do a work in 8 days. The same work.com
done by 3 men and 2 boys in 7 days. How long will take 5
4 boys to do the work?
1.9 days 2.6 days 3.8 days​

Answer 1

(2m+3b)8=(3m+2b)7

16m+24b=21m+14b

5m=10b

effi.m/b=2/1

total work =(2×2+3×1)8

= 56

56÷(5×2+4×1)

=4 ans.