Mathematics
Grade6
Easy
Question
Rebecca rides her horse with a constant speed of 15 miles per hour. Time taken by her to ride 10 miles is _____________ minutes.
- 10
- 20
- 30
- 40
Hint:
In this question, we are given the speed at which Rebecca is riding the horse. It is 15 miles per hour. Using this data, we are asked to find the time taken by her to ride 10 miles, given the rate is constant. We can try to find an equation using these quantities to get the value.
The correct answer is: 40
The given value of speed is 15 miles per hour
Speed = 15 miles/hour
Now, as the rate or speed is constant we can use this value to find the value of time required to travel 10 miles
Let’s see the formula
Rearranging the formula to find time. We will multiply both sides by time and divide by speed.
We have to find time in minutes. So we will convert hour into minutes. 1 hour is 60 minutes. So we will multiply the above equation by 60.
Time = 
× 60
Time = 40 minutes
Therefore, the time taken by Rebecca to ride the distance of 10 miles is 40 minutes.
So the option which is ‘40’, is the right option
We have to be careful about units in such questions. Same quantities must have same units.
