Shreya hikes up a hill at 5 mph and comes down at 7 mph. If the total time taken for the two-way journey is 3 hours, what is the distance between the hilltop and the foothill ?
Answer & explanation
Correct answer: option 1
When distance of going and coming back is same.
Distance = \(\frac{S1 × S2 }{S1 + S2 }\) × Total Time
= \(\frac{5 × 7 }{5+7 }\) × 3
= \(\frac{35 }{4 }\) = 8.75 miles