Question

A boy walking at a speed of 15 km/hr reaches his school 20 minutes late. Next time he increases his speed 5 km/hr, but still he is late by 10 minutes. Find the distance of his school from his house. a) 15 km b) 10 km c) 18 km d) 20 km​

Answer 1

Answer:

a. 15 km

Step-by-step explanation:

Let the distane = x

Here, the differe4nce in time

= 20 - 5 = 15 min

= 15/60 = 1/4 h

Speed during next journey = 15 +5 = 20 km/h

According to the question,

x/15−x/20=14

(4x−3x)÷60=14

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