Question

If someone drove 640 miles in 4 hours, how would you determine their speed in miles per hour?

A. Divide distance by time (640 miles / 4 hours)
B. Multiply distance by time (640 miles × 4 hours)
C. Subtract time from distance (640 miles - 4 hours)
D. Add time to distance (640 miles + 4 hours)

Answer 1

The correct way to determine the speed in miles per hour is to divide the distance by the time, or 640 miles / 4 hours. Option A is answer.

Step-by-step explanation:

Speed is calculated by dividing the distance traveled by the time taken to cover that distance. Therefore, option A, 640 miles / 4 hours, is the correct formula.

Option B, multiplying distance by time, would result in an incorrect value representing the total distance covered in more time, not the actual speed.

Option C, subtracting time from distance, doesn't make any sense in terms of calculating speed.

Option D, adding time to distance, would also result in a meaningless value.

Therefore, remembering the formula "speed = distance / time" will help you accurately calculate speed in similar situations.

Option A is answer.