Question

Superman can run so fast that he can runon water as well as land, and he never getstired. His average running speed is Mach 4, or4 times the speed of sound. For fun, hedecides to run around the Earth's equator, adistance of 40.075 kilometers. If the speed ofsound is 340.29 meters per second, and thereare 1,000 meters in a kilometer,approximately how many hours will it take forSuperman to complete his run?

Answer 1

Answer:

It will take Superman 32.71 hours or 32 hours and 43 minutes

Step-by-step explanation:

Convert kilometers to meters

40,075 kilometers = 40,075,000 meters

$\frac{340.29meters}{1 second} = \frac{40,075,000 meters}{x seconds}$ Cross multiply

340.29x = 40,075,000

x = 117,767.19 seconds

Convert seconds to hours

$\frac{3600 seconds}{1 hour} = \frac{117,767.19 seconds}{x hours}$ Cross multiply again

3600x = 117767.19

x = 32.71 hours or 32 hours and 43 minutes

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