Question

38 Mary cycles at 6 km per hour. How long will she take to reach her Aunt's house which is 12 km away? If she cycles at a speed of 4 km/hr, how long would she take ?
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Answer 1

Answer:

At 6 km per hour-

Time = Distance/Speed

= 12 km/6 km per hour

= 2 hour

At 4 km per hour-

Time = Distance/Speed

= 12 km/4 km per hour

= 3 hour

Step-by-step explanation:

This will help you

Answer 2

Here we are given that the distance is 12 km

We have to find the time taken to reach  when the speed is 6 km/hr

So, speed = distance/time

            6 = 12/time

         time = 12/6

          time = 2 hours

Now, we have to find the time taken if the speed is 4 km/hr

So, speed = distance/time

           4 = 12/time

         time = 12/4

         time = 3 hours