Question

Going 40 miles an hour how long would it take me to go 60 miles?

Answer 1

Hint: In this question, we are given that a person covers 40 miles in an hour (where miles is a unit to measure the distance and hour is the unit to measure the time), that is, we are given the speed of the person. We have to find the time in which the person will cover 60 miles; we know that speed is equal to the ratio of distance and time; so by using this formula, we can find out the correct answer.

Complete step-by-step answer:
We are given speed = 40 miles an hour and distance = 60 miles
We know that $ speed = \dfrac{{distance}}{{time}} $
Putting the known values in the above formula, we get –
 $
  40 = \dfrac{{60}}{{time}} \\
   \Rightarrow time = \dfrac{{60}}{{40}} \\
   \Rightarrow time = 1.5\;hours \;
  $
Hence, when the person is moving at a speed of 40 miles an hour, it would take him 1.5 hours to cover 60 miles.
So, the correct answer is “1.5 hours”.

Note: Speed is defined as the distance covered by a body per unit of time. From this definition, we got the formula of speed as the ratio of distance and time. While calculating any of the unknown quantities, we must be clear about the concept of speed. When a body is moving at a given speed, its direction is not considered and we consider that the speed remains exactly the same throughout the path. So, when we are calculating the time taken by the person to cover 60 miles, we don’t consider the path taken by him or the shape of the path, or the resistances in the path.