Steve can run 3 miles in 30 minutes, at this rate how many miles can he run in 20 minutes?

Решение

St e v e c an r u n 3 mi l es in 30 min u t es, a t t hi s r a t e h o w man y mi l es c an h e r u n in 20 min u t es ?

trip 2 distance : 2

Шаги решения

Given Time:

trip 1 : 30

trip 2 : 20

Given Distance:

trip 1 : 3

Represent the speed in terms of

x :

trip 1 : x

trip 1 Speed x Time 30 Distance 3

Write an equation for trip 1Distance = Speed

\cdot

Time

3 = x \cdot 30

Решите для

x, 3 = x \cdot 30 : x = \frac{1}{10}

speed : \frac{1}{10}

Represent the distance in terms of

y :

trip 2 : y

trip 2 Speed \frac{1}{10} Time 20 Distance y

Write an equation for trip 2Distance = Speed

\cdot

Time

y = \frac{1}{10} \cdot 20

Решите для

y, y = \frac{1}{10} \cdot 20 : y = 2

trip 2 distance : 2