Question

1 Working 8 h a day, 120 persons can dig a
canal 162 m long 12m wide and 2m deep in
8 days. Working 6 h a day, the number of
persons that will be required to dig a canal
729 m long, 10m wide and 3m deep in
32 days is
(SSC CPO 2013]
G250
175
to 200
A​

Answer 1

8 hrs = 120 people = (162×12×2=) 3888m³

6 hrs = x people = (729×10×3=) 21870m³

6/8 × 120 = 90 people to dig 3888m³

21870 ÷ 3888 = 5.625

90 × 5.625 = 506.25

32 ÷ 8 = 4

506.25 × 4 = 2025

So roughly 2025 people are needed to dig a 21870m³, working 6 hrs for 32 days. So the answer is 2025 people