Question

A student rides on bicycle at 8 km/h and
reaches his school 2.5 min late. The next he
increases his
speed to
10 km/h and reaches school 5 min early.
How far is the school from his house?
(1)5/8 km
(2)8 km
(3)5 km
(4)10 km
​

Answer 1

Step-by-step explanation:

Correct Answer:

(3) 5 km

Description for Correct answer:

Let the distance be x km

Then, x/8 - 2.5/60 = x/10 + 5/60

x/8 - x/10 = 5/60 + 2.5/60

=> 2x/80 = 7.5/60

=> x = 7.5×80/2×60 = 5 km

Answer 2

Answer:

Hope it's very helpful for you..