Question

If a student walks from his house to school at 5 kmph, he is late by 30 minutes. However, if he walks at 6 kmph, he is late by 5 minutes only. The distance of his school from his house is :

• A. 2.5 km
• B. 3.6 km
• C. 5.5 km
• D. 12.5 km

Answer 1

The correct option is D 12.5 km

Let the required distance be x km. Then,

$\frac{x}{5}-\frac{x}{6}=\frac{25}{60}$

$12x-10x=25$

$2x=25$

$x=12.5$ $km$