Question

Please help As soon as possible!

Answer 1

Answer:

C.=31.68 km/h

Step-by-step explanation:

Hello

I think  I can help you with this

Let

$v=8.8 \frac{m}{s} \\v=x \frac{Km}{h}$

1 hour = 60 minutes = 3,600 seconds

Step 1

convert m ⇒  kilometers

using a rule of three

1 kilometer= 1,000 meters

x? kilometers=8.8 m

$\frac{1 kilometer}{1000 m} =\frac{x\ kilometer}{8.8 m}$

isolating x

$\\\frac{1 kilometer\ 8.8\ m}{1000 m} =x\ kilometer\\x=0.0088 Km$

Now the speed is

$v=0.0088 \frac{Km}{s}$

Step 2

Convert sec ⇒ hours

1 hour =3600 sec

x hour=1 seg

$\frac{1 hour}{3600\ sec} =\frac{x\ hour}{1 sec}\\\frac{1 hour\ 1\ sec}{3600\ sec} =x\ hour\\x=\frac{1}{3600} hours$

Step 3

find the speed in km/h

$(1)v=0.0088 \frac{km}{1s}\\(2)1s=\frac{1}{3600} hous$

replacing (2) in (1)

$v=0.0088 \frac{km}{\frac{1}{3600} hour}\\v=0.0088*\frac{3600\ km }{hour} \\v=31.68 \frac{km}{h}$

V=31.68 km/h

Have a great day

Answer 2

Answer: Option C 31.68 km/h

Solution:

Speed=s=8.8 m/s

s=? kilometers per hour=? km/h

s=(8.8 m/ 1 s)*(1 km / 1,000 m)*(3,600 s / 1 h)

s=(8.8*1*3,600)/(1*1,000*1) km/h

s= 31,680/1,000 km/h

s=31.68 km/h