Railways
Sample Paper
RRB (Assistant Loco Pilot) Sample Test Paper-2
question_answer
A contractor was engaged to construct a road in 16 days. After working for 12 days with 20 labours it was found that only 5/8th of the road had been constructed. To complete the work in stipulated time the number of extra labours required is:
A) 12
B) 10
C) 18
D) 16
Correct Answer:
D
Solution :
Days
No. of Labourers
Work done
12
20
\[{5}/{8}\;\]
4
?
\[1-\frac{5}{8}=\frac{3}{8}\]
\[{{M}_{1}}{{D}_{1}}.{{W}_{2}}={{M}_{2}}{{D}_{2}}{{W}_{1}}\] \[20\times 12\times \frac{3}{8}={{M}_{2}}\times 4\times \frac{5}{8}\Rightarrow {{M}_{2}}=\frac{20\times 12\times 3\times 8}{4\times 5\times 8}=36\] Hence, \[36-20=16\]more men needed to complete the remaining work in 4 days.