A motorboat registers a speed of 15 km/h in still water. It takes 4 hours to cover a certain distance upstream. If the stream velocity is 3 km/h, find the distance covered.
Two delivery vans start from a junction hub and track along perpendicular cross lanes. One runs at 24 km/h and the other at 32 km/h. Find the separation distance between them after 1 hour.
Explanation:
In 1 hour, the first van covers 24 km and the second covers 32 km. Direct line separation distance = sqrt(24^2 + 32^2) = sqrt(576 + 1024) = sqrt(1600) = 40 km.
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