Question

Помогите пожалуйста! Задача для 5 класса. Папа и сын плывут на лодке против течения. В какой то момент сын уронил папину шляпу за борт. Только через 15 минут папа заметил пропажу. Как далеко находится шляпа и лодка,если собственная скорость лодки 8км\ч, а течения 3 км\ч?

Answer 1

Problem Analysis

To solve this problem, we need to determine the distance between the hat and the boat when the father noticed the hat was missing. We are given the boat's speed and the speed of the current. We can use the formula:

Distance = Speed x Time

Let's calculate the time it took for the father to notice the missing hat.

Calculation

The father noticed the missing hat 15 minutes after the son dropped it. We need to convert this time into hours because the boat's speed is given in kilometers per hour.

15 minutes = 15/60 hours = 0.25 hours

Now, let's calculate the distance traveled by the boat during this time.

The boat's speed is 8 km/h, and the current is against the boat, so we subtract the speed of the current from the boat's speed.

Boat's effective speed = Boat's speed - Current's speed = 8 km/h - 3 km/h = 5 km/h

Using the formula Distance = Speed x Time, we can calculate the distance traveled by the boat:

Distance = 5 km/h x 0.25 hours = 1.25 km

Therefore, the hat and the boat are 1.25 kilometers away from each other when the father noticed the missing hat.

Answer

The hat is 1.25 kilometers away from the boat when the father noticed the missing hat.

Please let me know if there is anything else I can help you with!