Question

A car travels a total distance of 150km. At the 50 minutes mark the car has travelled 50km and at the 110 minutes the car has travelled 120km. Find the average velocity in metres per second of the car between the 50-minute mark and the 110-minute mark.

Answer 1

Answer:

Explanation:

So, you were given an average speed for the car of 50km/hr and a time of 3 hours. One way you can do this is to look at it in fractions, with x being the distance you are looking for.

 

50 km = x km

1 hr        3 hrs

 

From there, you cross-multiply and solve for x.

 

(50 km)*(3 hrs) = (x km)*(1 hr)

 

x km = (50)*(3)/(1) = 150km

 

Now, your other question can be answered the exact same way. 30 minutes is the same as 1/2 of an hour, so just put 0.5hrs in where the 3hrs was in the previous problem. So to show you how it works once more, here are your calculations:

 

50 km = x km

1 hr        0.5 hrs

(50 km)*(0.5 hrs) = (x km)*(1 hr)

x km = (50)*(0.5)/(1) = 25km

 

I hope that helps!