you travelled a distance of 210 km by a car and the trip lasted 3 hours and 12 minutes. What is the average speed of your car ?
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A car is able to travel 210 km in 3 hours. How far can it travel in 5 hours?
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The formula which relates distance, speed, and time is:
d = rt, where d is the distance traveled, r is the rate of travel or speed, and t is the time traveled.
Since we're given that the car travels d = 210 km. in t = 3 hours; therefore, we can use the distance-speed-time formula to first find the speed r of the car as follows:
d = rt
210 km. = r(3 hr.)
210 km./3 hr. = [r(3 hr.)]/3 hr.
210 km./3 hr. = r(3 hr./3 hr.)
70 km./hr. = r(1)
r = 70 km. is the speed of the car; therefore, to find how far the car travels in 5 hours, we utilize the distance-speed-time formula again as follows:
d = rt
= (70 km./hr.)(5 hr.)
= 350 km. is the distance a car traveling at 70 km./hr. can travel in 5 hours.