The amazon river, one of the
longest rivers in the world, is about
6,400 kilometers long, if 1 mile
equals 1.6 kilometers, what is the
length of the amazon river in miles?

4000miles

Step-by-step explanation:

6400km =xmiles

1.6=1mile

x=6400/1.6

6400km= 4000miles

step-by-step explanation:

b and c

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.