SOLUTION: Dave and sara live 50 miles apart and travel towards each other on their bikes. Sara leaves on time and dave leaves 2 hours later but tries to make up for it by riding 7 mph faster
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Question 581312: Dave and sara live 50 miles apart and travel towards each other on their bikes. Sara leaves on time and dave leaves 2 hours later but tries to make up for it by riding 7 mph faster than sara.Find the speed of both sara and dave on their bikes, if sara is on the bike for 4 hours.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = Sarah's speed in mi/hr
= Dave's speed in mi/hr
given:
Sarah gets a head start of
They are miles apart when Dave leaves
----------
Now I can think of Sarah as standing still and
Dave moving towards her at the sum of their speeds
If Sarah is on her bike for hrs, then
when Dave starts, they both travel for more hrs
Sarah's speed is 6 mi/hr
Dave's speed is 13 mi/hr
check:
Their separate distances are:
Dave:
mi
Sarah:
mi
and
mi
OK
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