Question

PLEASE HELP!!!!


Bret and Cindy took different routes to travel from Point A to Point E. Bret took the route along A, B, C, D, and E. Cindy took the route along A, F, and E and reached the destination in 2 hours. Their routes are shown.


If Bret's average speed was twice Cindy's average speed, what was Bret's average speed?


3 miles per hour

6 miles per hour

8 miles per hour

9 miles per hour

Answer 1

So, Cindy would have had to walk 6 miles. Indicated by the numbers along her path. And since she went 6 miles in 2 hours, she had an average speed was 3. (6/3). And since Bret’s speed was double hers, (3•2) his average speed was 6mph.

Answer 2

6 miles per hour

What is Average velocity ?

The average speed is the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity. It is represented by the magnitude and does not have direction.

let average speed of Cindy will be = x

hence , average speed of Bret will be = 2x

since ,  Bret's average speed was twice Cindy's average speed

speed of Cindy will be

since , distance = speed * time

distance will be = (A to F) + (F to E) =  2 + 4 = 6

6 = x * 2

x = 6/2 = 3 miles per hour

Bret's average speed = 2x m/s = 2*3 = 6 miles per hour  

correct answer is 6 miles per hour

learn more about average speed  

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