Question

A girl rides her bike at 15 m/s for 20 s. How far does she travel in that time?
300m

How fast would the girl in the previous problem have been traveling if she had covered the same distance in 11 seconds?

Answer 1

Answer:

300 m

27.27 m/s

Explanation:

Use the formula:

Distance = speed × time

1.

Speed of the girl riding her bike = 15 m/s

Time taken = 20 s

Distance covered in the given time with the given speed:

Distance = 15 m/s × 20 s = 300 m

2.

Distance covered = 300 m

time taken = 11 s

Speed = Distance ÷ time taken

∴ Speed of the girl would be = (300 m)÷ (11 s) = 27.27 m/s

Answer 2

a. The distance traveled by the girl riding her back is 300 meters.

b. If she had covered the same distance in 11 seconds, her speed would be 27.27 m/s.

Given the following data:

• Speed = 15 m/s

• Time = 20 seconds.

a. To find how far (distance) she traveled in that time:

Mathematically, the distance traveled by an object or body is given by the formula:

$Distance = Speed$ × $time$

$Distance = 15$ × $20$

Distance = 300 meters.

b. To find how fast (speed) the girl in the previous problem would have been traveling if she had covered the same distance in 11 seconds:

$Speed = \frac{distance}{time} \\\\Speed = \frac{300}{11}$

Speed = 27.27 m/s.

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