A) 8
B) 12
C) 4
D) 6
Correct Answer: A
Solution :
Part of work done by 2 men and 2 women in 2 days. \[=2\left( \frac{2}{20}+\frac{8}{30} \right)\] \[=2\left( \frac{1}{10}+\frac{8}{30} \right)=2\left( \frac{3+8}{30} \right)\] \[=\frac{22}{30}=\frac{11}{15}\] Remaining work \[=1-\frac{11}{15}=\frac{4}{15}\] Work done by 1 boy in 2 days \[=\frac{2}{60}=\frac{1}{30}\] \[\therefore \] Number of boys \[=\frac{4}{15}\times 30=8\]You need to login to perform this action.
You will be redirected in
3 sec