Question

<p>Велосипедист за 3 ч проехал 57 км,а мотоциклист за 2 ч проехал на 71 км больше.На сколько километров в час скорость велосипедиста меньше скорости мотоциклиста.</p><p> </p>

Answer 1

1)скорость велосипедиста : 57/3=19км/ч.
2) за два часа велосипедист проехал 38км.
3) мотоциклист на 71 км больше, значит 38+71=109км. (за два часа)
4) за час: 109/2 =54,5км/ч
5) 54,5-19=35,5км/ч
Ответ: скорость велосипедиста меньше за скорость мотоциклиста на 35,5км/ч

Answer 2

Problem Analysis

We are given that a cyclist traveled 57 km in 3 hours, and a motorcyclist traveled 71 km more than the cyclist in 2 hours. We need to find the difference in speed between the cyclist and the motorcyclist in kilometers per hour.

Solution

To find the speed of each person, we can use the formula: Speed = Distance / Time

Let's calculate the speed of the cyclist and the motorcyclist.

1. Speed of the cyclist: - Distance traveled by the cyclist = 57 km - Time taken by the cyclist = 3 hours - Speed of the cyclist = 57 km / 3 hours = 19 km/h [[1]]

2. Speed of the motorcyclist: - Distance traveled by the motorcyclist = Distance traveled by the cyclist + 71 km (as the motorcyclist traveled 71 km more) - Distance traveled by the motorcyclist = 57 km + 71 km = 128 km - Time taken by the motorcyclist = 2 hours - Speed of the motorcyclist = 128 km / 2 hours = 64 km/h [[2]]

Answer

The speed of the cyclist is 19 km/h, while the speed of the motorcyclist is 64 km/h. Therefore, the speed of the cyclist is 45 km/h slower than the speed of the motorcyclist.