Question

If a die cast rally car drove 81 meters per second, how long did it take for it to go 90 meters. Round your answer to the nearest HUNDREDTH.

Answer 1

The car took 1.11 seconds to go 90 meters.

Explanation:

Set up an equation:

Variable x = number of seconds to travel 90 meters

81 meters/1 second = 90 meters/x seconds

Take out the variables for now to focus on calculations:

81/1 = 90/x

Cross multiply:

81 × x = 1 × 90

81x = 90

Divide both sides by 81:

x = 1.111111111... seconds

Round to nearest hundredth (hundredth is the second decimal place):

x = 1.11