00:01
In this problem we have been given that there is a boy and he runs with a uniform speed of 18 kilometers per hour for a time interval of 20 minutes.
00:13
And then he runs for another 40 minutes and we are required to determine the speed with which he should run for the next 40 minutes.
00:26
Let's take it as we, which is what we are required to compute, so that the average.
00:30
Speed for the entire journey that comes out to be 24 kilometers per hour.
00:37
So here we have been given the speed and the time.
00:42
So let's use this equation to relate the speed, distance, and time according to which the speed is distance over time.
00:51
So for the first 20 minutes, the distance that this boy will travel, that is speed multiplied with the time because that's what we get when we're rearrange this equation, d will be equal to v times t.
01:05
So the distance that we get here is 18 multiplied with let's convert this time in hours.
01:11
So we just divide this with 60 because each hour consists of 60 minutes and this turns out to be six kilometers.
01:21
And now the distance traveled in the next 40 minutes it will be we times 40 by 60...