- 2.5
- 2.0
- 1.75
- 1.5

One moves at 60km/h, so in an hour, he’ll travel 60km

The other moves at 40km/h, so in an hour, he’ll travel 40km

This is towards each other, so, in an hour, we can say that they’ll get 60+40=100km closer.

This means that they get closer at 100km/h

Given that we have the distance of 150km, and the speed of closure at 100kmh, we can now use the equation

S=D/T

Rearrange to find T (times both sides by T)

S x T = D (now divide both sides by S)

T=D/S

Time = 150km divided by 100km/h

**Time = 1.5 hours**

Or one hour and 30 minutes

**Answers:**1.5