B15. [Hard – WP] (Replaces Q40) A speedboat travels 36 miles upstream and then…
MATHEMATICS · Subjective · GCSE · Mathematics · Ratio and Proportion · Ratio and Proportion
Problem
B15. [Hard – WP] (Replaces Q40)
A speedboat travels 36 miles upstream and then returns 36 miles downstream to its starting point. The entire round trip takes exactly 5 hours. If the speed of the river's current is 3 mph, what is the boat's speed in still water?