Question

(1) 42 km/h (2) 50
A student rides on bicycle at 8 km/h and
reaches his school 2.5 min late. The next
day he increases his speed to
10 km/h and reaches school 5 min early.
How far is the school from his house?
(2) 8 km
(3) 5 km
(4) 10 km
(1) 3 km​

Answer 1

Answer:

5 km

Step-by-step explanation:

Description for Correct answer:

Let the distance be x km

Then, x8 - 2.560 = x10 + 560

x8 - x10 = 560 + 2.560

=> 2x80 = 7.560

=> x = 7.5×802×60 = 5 km