Why would a system of measurement using base 60 instead of base 10 have been used in ancient systems of measurement? a. it can be divided by many numbers c. base 60 is different for everyone b. it is based on having twelve digits (fingers and arms) d. base 60 was sacred

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.

13. jbhgfsfyfvhvbjko