Question

Лыжники шли до места назначения три дня.за 7 часов первого дня они прошли 70км.за 5ч второго дня 62км и за 6ч третьего дня 48км.с какой средней скоростью они двигались?

Answer 1

1)70:7=10(км/ч)-средняя скорость в первый день.

2)62:5= 12,4(км/ч)-средняя скорость за второй день.

3)48:6=8(км/ч)-средняя скорость за третий день.

4)(10+12,4+8):3= 30,4:3=10,13(км/ч)-средней скоростью за три дня.

Answer 2

Calculation of Average Speed

To calculate the average speed at which the skiers were moving, we need to determine the total distance covered and the total time taken.

The skiers traveled for three days, with the following distances covered each day: - First day: 70 km in 7 hours - Second day: 62 km in 5 hours - Third day: 48 km in 6 hours

To find the total distance covered, we add up the distances from each day: 70 km + 62 km + 48 km = 180 km

To find the total time taken, we add up the hours from each day: 7 hours + 5 hours + 6 hours = 18 hours

Now, we can calculate the average speed by dividing the total distance by the total time: Average speed = Total distance / Total time Average speed = 180 km / 18 hours

Calculation of Average Speed (continued)

To simplify the calculation, we can divide both the numerator and denominator by the greatest common divisor (GCD) of 180 and 18, which is 18.

180 km / 18 hours = (180 ÷ 18) km / (18 ÷ 18) hours Average speed = 10 km / 1 hour

Therefore, the skiers were moving at an average speed of 10 km/h.