Question

Мальчик и девочка, расстались на перекрёстке , пошли по взаимно перпендикулярным дорога- мальчик со скоростью 4км/ч, а девочка со скоростью 3км/ч. какое расстояние (в км) буде. между ними через 15 минут ?

Answer 1

1) 4 * 0,25= 1 км прошел мальчик (15мин=0,25часа)
2) 3 * 0,25 = 0,75 км прошла девочка
3) 1в квадрате + 0,75в квадрате=1,5625
     корень из 1,5625=1,25 км между ними

Answer 2

Calculating the Distance Between the Boy and the Girl

To calculate the distance between the boy and the girl after 15 minutes, we can use the formula:

Distance = Speed × Time

Given that the boy's speed is 4 km/h and the girl's speed is 3 km/h, and the time is 15 minutes (which is 0.25 hours), we can calculate the distance between them.

Calculations

For the boy: - Speed = 4 km/h - Time = 0.25 hours

For the girl: - Speed = 3 km/h - Time = 0.25 hours

Distance Calculation

For the boy: - Distance = 4 km/h × 0.25 hours - Distance = 1 km

For the girl: - Distance = 3 km/h × 0.25 hours - Distance = 0.75 km

Total Distance Between Them

To find the total distance between them, we can add the distances covered by the boy and the girl:

Total Distance = Distance covered by the boy + Distance covered by the girl Total Distance = 1 km + 0.75 km Total Distance = 1.75 km

So, the distance between the boy and the girl after 15 minutes will be 1.75 km.