Question

Велосипедист должен проехать 90 км . Он ехал 3 ч со скоростью p км/ч . Сколько километров ему осталось проехать ? Составте выражение и решите задачу , если P = 17 км/ч .

Answer 1

3*17=51 км проехал за 3 часа
90-51=39 км осталось

Answer 2

Problem Statement

A cyclist needs to travel a distance of 90 km. They have been cycling for 3 hours at a speed of p km/h. The question is: how many kilometers does the cyclist have left to travel? If p = 17 km/h, solve the problem.

Solution

To solve this problem, we can use the formula: Distance = Speed × Time

Let's denote the distance the cyclist has left to travel as D_left (in km), the speed of the cyclist as p (in km/h), and the time the cyclist has already traveled as T (in hours).

The distance the cyclist has already traveled can be calculated as: Distance_traveled = Speed × Time

Since the total distance the cyclist needs to travel is 90 km, the distance the cyclist has left to travel can be calculated as: D_left = Total_distance - Distance_traveled

Substituting the values, we get: D_left = 90 - (p × T)

Now, let's substitute p = 17 km/h and T = 3 hours into the equation to find the distance the cyclist has left to travel: D_left = 90 - (17 × 3)

Calculating the expression: D_left = 90 - 51 = 39 km

Therefore, the cyclist has 39 km left to travel.

Answer

The cyclist has 39 km left to travel.