Question

Велосепедист за 6ч.проехал 72.скорость мотоцеклиста на 15км/ч больше чем скорость велосепедиста. За сколько часов мотоциклист проедет 81км?

Answer 1

1)72:6=12(км/ч)-скорость велосепидиста.

2)12+15=27(км/ч)-скорости мотициклиста.

3)81:27=3(ч)

Ответ: За 3 часа мотоциклист проедет 81км.

Answer 2

To solve this problem, we can use the concept of distance, speed, and time. We have the following information:

• The cyclist rode a distance of 72 km in 6 hours.
• The motorcycle's speed is 15 km/h greater than the cyclist's speed.

Let's find the speed of the cyclist first:

Distance = Speed × Time 72 km = Speed of the cyclist × 6 hours

Speed of the cyclist = 72 km / 6 hours Speed of the cyclist = 12 km/h

Now we know the cyclist's speed is 12 km/h. We are asked to find how long it will take for the motorcycle to travel 81 km.

Let T be the time taken by the motorcycle to travel 81 km.

Distance = Speed × Time 81 km = Speed of the motorcycle × T hours

The motorcycle's speed is 15 km/h more than the cyclist's speed, so it is (12 km/h + 15 km/h) = 27 km/h.

Now, let's find the time taken by the motorcycle (T):

81 km = 27 km/h × T hours

T = 81 km / 27 km/h T = 3 hours

So, the motorcycle will take 3 hours to travel 81 km.