Question

If Janelle originally started 575

Answer 1

Given that Janelle travels at 65 mph. the number of more hours it will

take her to reach her destination is approximately 5 hours.

How can the time to reach her destination be calculated?

Possible part of the question that appear missing are;

The distance Janelle drove in 4 hours = 260 miles

The distance from which she started = 575 miles

Required:

The number of extra hours it will take her to reach her destination

Solution:

The remaining distance = 575 miles - 260 miles = 315 miles

$Speed = \mathbf{ \dfrac{Distance}{Time}}$

$Janelle's \ average \ speed = \dfrac{260 \, miles }{4 \, hours} = \mathbf{ 65 \, mph}$

$Time = \dfrac{Distance}{Speed}$

Which gives;

$Time \ to \ reach \ her \ destination = \dfrac{315 \, miles}{65 \, mph} = 4\frac{11}{13} \, hours \approx \mathbf{ 5 \, hours}$

The time it takes Janelle to reach her destination ≈ 5 hours

Learn more about average speed during motion here:

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