If it takes 10 days to big a trench 100m long, 50m broad and 10m deep. What length of trench, 25m board and 15m deep can be dug in 30 days ?
Solution
Correct Answer: Option A
Solution: 100 \( \times \) 50 \( \times \) 10 = 50000m then (50000 \( \times \) 30)/ 10 = 150000 then 150000/ 15 \( \times \) 25 = 400
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