Question

Amit cycles to his school at an average speed of $14$ km/hr. It takes him $30$ minutes to reach the school on time. At what speed should he cycle, if he wants to reach $2$ minutes earlier?

Answer 1

Speed = 14 km/hr, Time = 30 minutes
Distance of school $=\frac{14\times 30}{60}$
$=7km$
New time in which 7 km is to be covered $=(30-2)$ min
$=28$ min
$=\frac{28}{60}$ hr
$=\frac{7}{15}$ hr
speed = $\frac{distance}{time}$
=$\frac{7\times 15}{7}$
=15km/hr