A car ascends an incline path 24 km long at 6 km/h and maps the return path descent at 12 km/h. Find the net average speed for the round course. MCQ with Answer and Explanation
A stream flows at 3 km/h. A boat can row 9 km/h in still water. How much time does it take to go 24 km downstream and return upstream to the starting point?
Explanation:
Speed of the boat in still water = (Downstream Speed + Upstream Speed) / 2 = (18 + 12) / 2 = 15 km/h. Distance covered in 3 hours = 15 * 3 = 45 km.
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