- A min
- B36 min
- C30 min
- D40 min
Step-by-Step Solution
X is full after min, when Y has L. The last 300 L at L/min take min. Total min. (36 min is Y's pump alone.)
Answer: A) min
Tank X holds 1,200 litres and tank Y holds 1,800 litres. One pump fills X at 40 litres per minute and another fills Y at 50 litres per minute. When X is full, its pump is switched over to Y as well. How long after the start is Y full?
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