Question

Ben and Jerry went for a drive. They decided to stop for a snack and have some ice cream. How fast did they drive on their way to the store?

A) 15 km/h
B) 30 km/h
C) 40 km/h
D) 60 km/h

Answer 1

They are driving at the speed of 30 km/h

Step-by-step explanation:

From the graph it is clear that,

Total distance covered by Ben and Jerry, d = 60 km

The distance of 60 km is covered in 2 hours.

We have to find how fast they drive on their way to the store i.e their speed. We know that,

`speed=(distance)/(time)`

`s=(60\ km)/(2\ h)`

`s=30\ km/h`

Hence, the correct option is (B) " 30 km/h ".

Answer 2

Answer: B) 30 km/h

Step-by-step explanation:

The speed of Ben and Jerry on their way to the store is given by

`v=(d)/(t)`

where

d is the distance they covered

t is the time they took

From the graph, we see that Ben and Jerry travelled for a distance of d=60 km in a time of t=2 h, so their speed is

`v=(60 km)/(2 h)=30 km/h`