Question

Charlotte is running at a rate of 9\,\dfrac{\text{km}}{\text{h}}9

Answer 1

Answer: Charlotte's speed in meter/second is 2.5m/s.

Step-by-step explanation:

Given speed of Charlotte in kilometer per hour = 9 km/h

We need to find the Charlotte's speed in meter per second.

We know 1 kilometer = 1000 meter

And 1 hour = 3600 seconds.

Plugging those values of km and hour in given speed in km/h, we get

$9\ \frac{km}{h} = 9\times \ \frac{1000m}{3600 seconds}$

$=\frac{10m}{4s}= 2.5\ m/s$.

Therefore,

Charlotte's speed in meter/second is 2.5m/s.

Answer 2

Answer:

Speed of Charlotte in a Unit which includes Km and hour $=9 \frac{\text{Km}}{\text{hour}}$

1 Km=1000 meter

1 hour=60 minutes=3600 seconds

Speed of Charlotte in a Unit which includes meter and second is

                     $=\frac{9 \times 1000}{3600}\frac{\text{meter}}{\text{seconds}}\\\\=\frac{90}{36}\frac{\text{meter}}{\text{seconds}}\\\\=\frac{5}{2}\frac{\text{meter}}{\text{seconds}}$