Question

A car leaves city A, at a speed of 90 km / h. Three hours later another car leaves the same city in search of the first one with a speed of 120 km / h. in which point do they meet?

Select the appropriate answer:
A) 120km
B) 30km
C) 1080km
D) 560 km

Answer 1

C) 1080km

Explanation:

Let t be the time after A leaves

Distance covered by A:

90t

Distance covered by B:

120(t - 3)

90t = 120(t - 3)

90t = 120t - 360

30t = 360

t = 12

Distance: 90(12) = 1080