A car is traveling at a rate of 20 meters per second. What is the car's rate in kilometers per hour? How many kilometers will the car travel in 3 hours?

kilometers-per-hour

#1

A car is traveling at a rate of 20 meters per second. What is the car’s rate in kilometers per hour? How many kilometers will the car travel in 3 hours? Do not round your answers.

Answer:

1 hour = 60 x 60 secs= 3600
1 km= 1000 meters
To convert m/s into km/s, multiply by 3.6 (60 x 60 ÷1000)
Hence 20m/s = (20 x 3.6) km/hr
=72km/hr.
Distance = Speed x Time
Hence Distance= 72km/hr x 3 hr
= 216 km travelled.