A car travels at 20 meters per second. what is its rate per hour ?

A) 72 kilometers per hour
B) 5.6 kilometers per hour
C) 1.2 kilometers per hour
D) 56 kilometers per hour

A) 72 kilometers per hour

Step-by-step explanation:

It goes 72 kilometers per hour because to there are 60 seconds in a minute and so you have to multiply 20 * 60 so, 1200 meters per minute and there are 60 minutes in a hour so you multiply 1200 * 60 so, that is 72,000 meters per hour. and since there are 1,000 meters in one kilometer you divide 72,000  so 72 kilometers per hour.

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

step-by-step explanation:

answers available in this download

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