he

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

פּוֹפּוּלָרִי Word Problems >

For a car moving at a constant speed, the distance traveled varies directly with the time spent driving. If such a car travels 220 miles in 4 hours, how many miles does it travel in 3 hours?

פתרון

F or a c a r m o v in g a t a co n s t an t s p ee d, t h e d i s t an ce t r a v e l e d v a r i es d i rec tl y w i t h t h e t im e s p e n t d r i v in g . I f s u c h a c a r t r a v e l s 220 mi l es in 4 h o u rs, h o w man y mi l es d oes i t t r a v e l in 3 h o u rs ?

פתרון

trip 2 distance : 165

צעדי פתרון

Given Time:

trip 1 : 4

trip 2 : 3

Given Distance:

trip 1 : 220

Represent the speed in terms of

x :

trip 1 : x

trip 1 Speed x Time 4 Distance 220

Write an equation for trip 1Distance = Speed

\cdot

Time

220 = x \cdot 4

220 = x \cdot 4, x

פתור בשביל:

x = 55

speed : 55

Represent the distance in terms of

y :

trip 2 : y

trip 2 Speed 55 Time 3 Distance y

Write an equation for trip 2Distance = Speed

\cdot

Time

y = 55 \cdot 3

y = 55 \cdot 3, y

פתור בשביל:

y = 165

trip 2 distance : 165

דוגמאות פופולריות

You invest 5,000 in a savings account paying 4% interest compounded quarterly. How much is in the account after 5 years The radius of a circle is 4 in. Find its area in terms of pipi.You deposit 6000 in an account earning 5% interest compounded semiannually. How much will you have in the account in 5 years?The diameter of a circle is 8 m. Find its area in terms of pipi.Maureen is saving up money to buy a car. Maureen puts 10,000.00 into an account which earns 4% interest, compounded monthly. How much will she have in the account after 7 years?