Question

Грузовая машина проехала 336 км сос редней скоростью 42 км/ч.На обратный путь машина затратила на 1 ч меньше.С какой средней скоростью ехала машина обратно?

Answer 1

1) 336 : 42 = 8 час была машина в пути туда

2) 8 - 1 = 7 часов ехала машина обратно

3) 336 : 7 = 48 км/час - скорость машины обратно

Answer 2

Calculation of Average Speed

To calculate the average speed of the truck on the return journey, we need to determine the time taken for the return journey.

Given that the truck traveled 336 km on the forward journey with an average speed of 42 km/h, we can calculate the time taken for the forward journey using the formula:

Time = Distance / Speed

Forward journey time = 336 km / 42 km/h = 8 hours

Since the truck took 1 hour less for the return journey, the total time for the return journey would be 8 - 1 = 7 hours.

To calculate the average speed for the return journey, we can use the formula:

Speed = Distance / Time

The distance for the return journey is also 336 km, and the time taken is 7 hours.

Therefore, the average speed for the return journey is:

Speed = 336 km / 7 hours = 48 km/h

So, the truck traveled at an average speed of 48 km/h on the return journey.