Answer:
Woody arrived
27
- 9
= 18 minutes before Barbie did.
Step-by-step explanation:
When you are working with Distance=speed-time problems remember that if you know two of the values you can calculate the third one,
Barbie: She walks at a speed of 70 metres per minute.
Woody: Cycles 3 times as fast: →3
×
70
=
210
m/min
He cycled for 9 minutes.
210
m/min is his speed.
9 minutes is the time he took.
Distance = speed × time
D = 210 ×
9 = 1890 metres,
Barbie: walked the same distance of 1890 metres
Her speed was 70 m/min
The time she took:
Time=
[tex]\frac{Distance}{Speed}[/tex]
T
i
m
e =
[tex]\frac{1890}{70}[/tex] = 27 minutes.
Woody arrived 27 − 9 = 18 minutes before Barbie did.
