Use the conversion ratio 1 kilometer equals about 0.62 miles to solve the following problem. It may help to set up a proportion. An airplane travels about 900 kilometers per hour. What is the airplanes speed in miles per hour? 1 kilometer = 0.62 miles
A. 899.38
B. 1451.6
C. 1240
D. 558
To solve this problem, we can set up a proportion:
(900 kilometers) / (1 hour) = (x miles) / (1 hour)
Since we know that 1 kilometer is equal to 0.62 miles, we can set up the proportion as:
(900 kilometers) / (1 hour) = (x miles) / (1 hour) * 0.62 miles/kilometer
Cross multiplying, we get:
900 kilometers = 0.62x miles
Divide both sides by 0.62 to isolate x:
x = 900 kilometers / 0.62 miles
x ≈ 1451.6
Therefore, the airplane's speed in miles per hour is approximately 1451.6 miles per hour.
So the correct answer is B. 1451.6