You drive home from work on the highway at a speed of 100 per hour.

Question

After travelling 20 km, it starts to snow and you reduce your speed to 60km per hour. If the whole trip takes 36 minutes, how far are you from your work?

Answer 1

t = d / r

t₁ = 20 / 100

t₂ = d / 60

t₁ + t₂ = 0.6 (36 minutes is 6/10 of an hour)

Can you solve for d and answer?