- A1 h 45 min
- B1 h 30 min
- C2 h
- D45 min
Step-by-Step Solution
Monday: 30/12 + 30/8 = 2.5 + 3.75 = 6.25 h. Tuesday: 30/15 + 30/5 = 2 + 6 = 8 h. Extra = 1.75 h = 1 h 45 min.
Answer: A) 1 h 45 min
A launch runs at 10 km/h in still water. On Monday the current is 2 km/h; on Tuesday it is 5 km/h. How much longer does a 30 km out-and-back run (30 km each way) take on Tuesday?
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