Question

Which expression calculates the speed in meters per second of an object that travels a distance of 40 m every 10 s?

10÷40
or
40 + 10
or
40/10
or
40×10

Answer 1

40x10 is the correct one

Answer 2

40/10 [4 meters/sec]

Explanation:

Watch for what the units are telling us. The number that is being requested

is speed in units of meters/sec. We are given 40 meters and 10 seconds. If we divide 40 meters by 10 seconds (10 meters/10 seconds), we get 4 meters/sec, the correct dimension.