*25 brainliest for whoever answers first*
lara and tim took different routes to travel from point a to point c. lara took the route along a, b, and c. tim took the route along a, e, d, and c. their routes with distances and times are shown.
a 5 sided figure abcde is shown. point a is labeled start and point e is labeled end. ab is 6 miles and 1.5 hours, bc is 2 miles and 1 hour, cd is 6 miles and 1.5 hours, de is 4 miles and 1.5 hours, and ae is 2 miles and 0.5 hour
which person's average speed is greater?

Lara's average speed :

average speed = total distance / total time

                         => 8 miles / 2.5 hours

                         => 3.2 mph

Tim's average speed :

= total distance / total time

= 12 miles / 3.5 hours

= 3.43 mph

therefore,

Tim's average speed (3.43 mph) is greater.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.