Question

Tom is riding his bike to the store. After 2
minutes he has traveled 3 blocks, after 6
minutes, he has traveled 9 blocks. Find his
average speed in blocks per minute.
O 1.5 blocks per minute
O 2/3 blocks per minute
O 3.2 blocks per minute
06 blocks per minute

Answer 1

Hello!

The answer is:

The correct option is the first option, the average speed in blocks per minute is 1.5 blocks per minute.

$AverageSpeed=1.5\frac{Block}{minute}$

Why?

To calculate the average speed we need to calculate the total distance traveled and the total time taken to cover that distance.

From the statement we know that:

$Distance_{1}=3blocks\\Distance_{2}=9blocks-3blocks=6blocks\\time_{1}=2minutes\\time_{2}=6minutes$

So, we need to use the following formula in order to calculate the average speed:

$AverageSpeed=\frac{distance_{1}+distance_{2}}{t_{1}+t_{2}}$

Then, substituting we have:

$AverageSpeed=\frac{3blocks+9blocks}{2minutes+6minutes}$

$AverageSpeed=\frac{12blocks}{8minutes}=1.5\frac{blocks}{minutes}$

Hence, we have that the correct option is the first option, the average speed in blocks per minute is 1.5 blocks per minute.

$AverageSpeed=1.5\frac{Block}{minute}$

Have a nice day!