SOLUTION: Angela made a trip of 320 miles. For the first 3 hours she was driving in rain. When the rain had stopped she was able to increase her speed by 10 mph and finish the trip 2 hours l

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Question 274148: Angela made a trip of 320 miles. For the first 3 hours she was driving in rain. When the rain had stopped she was able to increase her speed by 10 mph and finish the trip 2 hours later. How fast was she going during the first part of the trip?During the second part?

Thanks for helping me!
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
r*t=d
r*3+(r+10)*2=320
r=60 mph first part
r+10=70 mph second part
check
3*60+2*70=320
180+140=320
320=320
ok