Zach had a rope that was 15 feet long. he cut it into 3 pieces. the first piece is 3.57 feet longer than the second piece. the third piece is 2.97 feet longer than the second place. how long is the third piece of rope?
show work.

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.