An airplane travels 3100km at a speed of 790km/h and then enounters a tailwind that boosts the speed to 990km/h for he next 2800km.
a)What was the total time for the trip?
I calculated this to be 6.75h
b) whatwasthe average speed of the plane for the trip?
I just cant figure out how to set this up?
2007-05-30 17:40:55 · 4 answers · asked by 11 2 in Science & Mathematics ➔ Physics
Haha i just realzied after i asked the question. sry to waste your time :) for some reason i thought it had to be more complicated than it was.
2007-05-30 17:54:29 · update #1
Average speed ?
An airplane travels 3100km at a speed of 790km/h and then enounters a tailwind that boosts the speed to 990km/h for he next 2800km. and then a bunch of terrorists crash it into a field.
a)What was the total time for the trip?
2007-05-30 17:49:56 · answer #1 · answered by Anonymous · 0⤊ 0⤋
average speed = total distance / total time
average speed = (3100km + 2800km) / 6.75hr
average speed = 874.07 km/hr
2007-05-31 00:46:28 · answer #2 · answered by 7 · 1⤊ 0⤋
a)3100/790 + 2800/990 = 3.92+2.83 = 6.75 hrs
b)3100+2800/6.75 = 874.07 km/hr
2007-05-31 00:49:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
somebody is right.
2007-05-31 00:53:13 · answer #4 · answered by Stand-up philosopher. It's good to be the King 7 · 0⤊ 0⤋