Exercises: Solving Problems Using the Speed Formula

Speed = Distance ÷ Time, since this is the formula most learners remember first from earlier lessons.

Time = Distance ÷ Speed, since this also involves dividing distance by another quantity.

Distance = Speed × Time

Distance = Speed × Time = 10 × 2

Distance = Speed ÷ Time = 10 ÷ 2, since dividing is the operation used in the original speed formula.

Distance = Speed − Time = 10 − 2, since subtracting seems like a simpler way to combine the two given numbers.

Time = Distance × Speed = 200 × 50, since multiplying the two given numbers seems like the natural next step.

Time = Speed ÷ Distance = 50 ÷ 200, since it uses the same two numbers in a different order.

Time = Distance ÷ Speed = 200 ÷ 50

100 km, found by multiplying 25 by 4.

29 km, found by adding the speed and the time together instead of combining them another way.

6.25 km, found by dividing the speed by the time instead of multiplying them together.