A passenger car drove the way to the regional center at a speed of 90 km / h, and a truck at a speed of 20 m / s

A passenger car drove the way to the regional center at a speed of 90 km / h, and a truck at a speed of 20 m / s. How long was the truck on the road if the car was traveling for 20 minutes?

These tasks: Vl (speed of a car) = 90 km / h (in SI Vl = 25 m / s); Vg (truck speed) = 20 m / s; tl (duration of movement of a car) = 20 minutes (in SI tl = 1200 s).

The required time of a truck on the way can be expressed from the equality: Vl * tl = S (distance to the regional center) = Vg * tg, whence tg = Vl * tl / Vg.

Let’s perform the calculation: tg = 25 * 1200/20 = 1500 s or 25 minutes.

Answer: The truck drove to the regional center in 25 minutes.