Предмет: Математика, автор: Alla9

От деревни Пеньки до озера Лесное 24 км.С какой скоростью надо идти,чтобы дойти до него за 6 часов?Сколько времени понадобится,если увеличить свою скорость в 2 раза?

 

Ответы

Автор ответа: nataly77
0

1) 24:6=4 (км/ч) - скорость в пути за 6 часов

2) 4*2=8 (км/ч) - увеличение скорости в 2 раза

3) 24:8=3 (часа)

Ответ: на прохождение пути с увеличенной скоростью потребуется 3 часа.

Автор ответа: Svet1ana
0

S=24 км

t=6 ч

t₁ - ? ч, в 2 раза > t

Решение:

S=v·t ⇒ v=S:t

24:6=4 (км/ч) - скорость в пути за 6 часов.

4·2=8 (км/ч) - скорость увеличенная в 2 раза.

t=S:v

24:8=3 (ч)

Ответ: потребуется 3 часа на прохождение пути с увеличенной скоростью.

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