Question

A snail is moving along a straight line at a constant rate. It movesof a foot inn , of an hour.What is the average speed of the snail?o 20 feet per hourfeet per hour01 feet per hour0 14 feet per hour

Answer 1

It moves 3/10 of a foot in 1/6 of hour

Average Speed : The average speed is the total distance traveled by the object in a particular time interval.

$\text{ Average Sp}eed\text{ = }\frac{Total\text{ distance}}{Total\text{ time taken}}$

In the given question

we have distance = 3/10

time = 1/6 hour

$\begin{gathered} \text{ Average Sp}eed=\text{ }\frac{\frac{3}{10}}{\frac{1}{6}} \\ \text{ Average speed}=\frac{3}{10}\times6 \\ \text{ Average Spe}ed=\frac{18}{10} \\ \text{ Average Spe}ed\text{ = }\frac{9}{5}\text{ fe}et\text{ per hour} \end{gathered}$

Write it in the mixed fraction:

$\frac{9}{5}=1\frac{4}{5}\text{ fe}et\text{ per hour}$

Answer : D)