# Having Trouble with these 2 problems

buck3y3nut
Having Trouble with 1 problem now. Plz help! Thank you!

Hey guys,
This might be cake for you, but it's bugging me right now because I can't figure it out...

I figured out the 1st problem. Trying my hardest to get this one. Can someone please give me a hint on how to approach this problem please?

2. Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 20 mph and half the distance at 60 mph. On her return trip, she drives half the time at 20 mph and half the time at 60 mph.
(a) What is Julie's average speed on the way to Grandmother's house?

I got the right answer. Just had to convert the .5 to minutes and i came up with 30 mph for this answer which was right... Now I can't figure out the 2nd part...

(b) What is her average speed on the return trip?

Any hints on how to approach this problem?

Any help will be greatly appreciated. Sorry, never took physics in high school so this might be cake for some of you...
Thank you again

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buck3y3nut