A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current ?5
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Q: A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current ?
- 11 kmphfalse
- 23.2 kmphfalse
- 31.5 kmphtrue
- 42 kmphfalse
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