Question

Велосипедист за 6ч проехал 72км.Скорость матоциклиста на 15км/ч больше скорости елосипедиста.За сколько часов мотациклист проедет 81км?

Answer 1

72:6=12(км/ч)-скорость велосепедиста
12+15=27(км/ч)-скорость мотциклиста
81:27=3(ч)-за 3 часа
Ответ:За 3 часа

Answer 2

Велосипедист ехал-72:6=12(км/ч) Матоциклист-12+15=27(км/ч) 81км он проехал за 81:27=3(ч)

Answer 3

Let's denote the speed of the cyclist as "x" km/h. According to the given information, the cyclist traveled 72 km in 6 hours. Therefore, we can calculate the speed of the cyclist using the formula:

Speed = Distance / Time

x = 72 km / 6 h x = 12 km/h

Now, we know that the speed of the motorcyclist is 15 km/h faster than the cyclist's speed. So, the speed of the motorcyclist would be:

x + 15 km/h

To find out how long it takes for the motorcyclist to travel 81 km, we can use the same formula:

Time = Distance / Speed

Time = 81 km / (x + 15) km/h

Now we can substitute the value of x we calculated earlier:

Time = 81 km / (12 + 15) km/h Time = 81 km / 27 km/h Time ≈ 3 hours

Therefore, the motorcyclist will travel 81 km in approximately 3 hours.