darkhanger18
Newly Enlightened
trying to help the girlfriends little brother here....It might just be me, but hell if i can solve this....
peggy sue drives from her house to billy bobs for thanksgiving. she drives at a rate of 20 mph there. billy bobs house is 20 miles away. how fast must she drive home if her avg. speed for the whole trip is 40 mph?
and then theres a note at the bottom:
answer is NOT 60, clearly 20+60/2=40, but you would be driving at 20mph for a longer period of time then you would be @ 60mph.
i feel like a moron being 19 and not being able to do 8th grade math, hopefully some of our geniuses on the board will be able to shed some light on this one.... thanks in advance for any help you offer
peggy sue drives from her house to billy bobs for thanksgiving. she drives at a rate of 20 mph there. billy bobs house is 20 miles away. how fast must she drive home if her avg. speed for the whole trip is 40 mph?
and then theres a note at the bottom:
answer is NOT 60, clearly 20+60/2=40, but you would be driving at 20mph for a longer period of time then you would be @ 60mph.
i feel like a moron being 19 and not being able to do 8th grade math, hopefully some of our geniuses on the board will be able to shed some light on this one.... thanks in advance for any help you offer