Question

Самолет летел 1,2ч со скоростью 840км/ч,а в следующие 0,6ч из-за встречного ветра его скорость снизилась до 780км/ч.С какой средней скоростью он пролетел этот путь?

Answer 1

840*1,2=1008
780*0,6=468
468+1008=1476
1,2+0,6=1,8
1476/1,8=820 км/час

Answer 2

Calculation of Average Speed

To calculate the average speed of the plane, we need to consider the total distance traveled and the total time taken.

Given: - The plane flew for 1.2 hours at a speed of 840 km/h. - In the next 0.6 hours, due to a headwind, the speed decreased to 780 km/h.

To find the total distance traveled, we can add the distances covered in each time interval. Since the speed is constant within each interval, we can use the formula:

Distance = Speed × Time

For the first interval of 1.2 hours: Distance1 = Speed1 × Time1 = 840 km/h × 1.2 h

For the second interval of 0.6 hours: Distance2 = Speed2 × Time2 = 780 km/h × 0.6 h

To find the total time taken, we can simply add the time intervals:

Total Time = Time1 + Time2 = 1.2 h + 0.6 h

Finally, we