Very important question

Question

Sound travels about 750 miles per hour. If you stand in a canyon and sound a horn, you will hear an echo.Suppose you stand 550 feet from the canyon wall and sound the horn. How long will it take to hear the echo?

Answer 1

sound of your voice goes 2(550) to come back to you or 1100 feet

at 750 mph = 750(5280) ft/60 minutes

750)(5280)/60 = 750(528)/6 = 750(88) ft/min = 1100/X

750(88)X =1100

X = 1100/88(750) = 100/8(750) = 12.5/750 = 12.5(60) seconds/750 = 750/750= 1 second