Two cars start at the same location and travel in the same d

Two cars start at the same location and travel in the same direction at average speeds of 30 and 55 miles per hour. Let t stand for time.

A1) Write an expression for the distance traveled by the faster car in t hours:

faster distance

A2) Write an expression for the distance traveled by the slower car in t hours:

slower distance

A3) How many HOURS have passed when the cars are 10 miles apart?

A4) How many MINUTES have passed when the cars are 10 miles apart?

Solution

A1 ) Distance = velocity x time = 55 t is the distance travelled by the faster car

A2) = 30 t is the distance travelled by the slower car

A3 ) distance between the two cars in 1 hour is 25 miles

when the distance is 10 miles the time taken is = 10 / 25 = 2 / 5 hours

A4 ) converting in minutes (2 / 5 ) x60 =24 minutes