Abhishek climbs up a hill at a speed of 3 mi/h and comes down at a speed of 5 mi/h. If the total time taken for the two-way journey is 10 hours, then what is the distance between the hilltop and the foothill ?
Answer & explanation
Correct answer: option 2
Let distance b/w foothill and to = D miles
According to question ,
\(\frac{D}{3}\) + \(\frac{D}{5}\) = 10 hours
\(\frac{8D}{15}\) = 10
8D = 150m
D = \(\frac{150}{8}\)
= 18.75 miles
So , Distance b/w foothill and top is 18.75 ml/h