A truck at a speed of 60 km / h traveled the distance between cities in 8 hours. How many hours will it take for a passenger

A truck at a speed of 60 km / h traveled the distance between cities in 8 hours. How many hours will it take for a passenger car to travel the same distance at a speed of 80 km / h?

If a truck moves at a speed of 60 km / h, and a passenger car moves at a speed of 80 km / h, while driving the same distance, then the ratio of their speeds will be inversely proportional to the ratio of the time they spend on the road. Let’s designate the time spent by a passenger car equal to X h, then we can make a proportion:

60/80 = X / 8;

X = 60 * 8/80 = 6 hours.

Answer: a passenger car will spend 6 hours on the road.

Let’s check our calculations by the traditional solution of the problem:

The distance that a truck will travel in 8 hours is:

s = v * t = 60 * 8 = 480 km.

In this case, a passenger car will spend on the road:

t = s / v = 480/80 = 6 h.

The answer matched.