Best Answer

Speed = distance/time

km/hr = 90km/3hr

90/3=30

30km/hr

Q: What is a car's speed in kilometers per hour if a 90 kilometer trip took 3 hours?

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I think it is 3 and a harf hours. incorrect. even if dan only washes one hubcap, joe will wash the rest of both cars in less than 2 hours.

Never, since they are travelling in opposite directions.. . . but probably not the one the algebra book's authors intended....If you assume that "opposite directions" means the cars are travelling towards each other, their closing speed (i.e. relative speed) is 105 mph. That means they'll meet in 100/105 hours, or slightly more than 57 minutes.

7 hours, because if you keep adding one person its about one hour less then you just times that by the number of cars (which is seven)

It would be 65 MPH.

.66667 miles per hour

Related questions

Total distance = 75 km time = 3 hours average speed = 75km/3hrs = 25 km/hr

The cars avg speed would be 66 km/ 3 hr which is 22kmh

if you mean are Canadian car's speed measured in kilometers then yes because Canada uses the metric measurement system

136.7 mph

Most cars can easily go at that speed. That's about 80 kilometers per hour.

A cars speedometer measures speed. A speedometer is a gauge that displays the speed of a vehicle so the driver will know how fast the vehicle is moving.

96 km/hr = 59.7 mph (rounded)

87

The speed of an car per hour[s] is the speed that the car is going.Example- If a car is going 75 miles for5 hours,what is the cars speed.The car speed is 75 miles per hour.

well we know that we have two speeds and a time. So, initial speed = 80 final speed = 60 change in time = 6 Now acceleration in this case will be measured in kilometers per hour per second (i.e. every x seconds, y kilometers per hour are gained in speed) So we simply apply the formula Acceleration = (final speed - initial speed)/ change in time = (80 - 60)/6 = 20/6 = 3.6666667 km/h/s

A unit rate is simply how we describe speed in this case. Examples: Miles per hour Kilometers per hour Feet per second Meters per second and so on.

A speedometer is a tool used to record a cars speed.