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Acceleration

Mr. Smith lef...

Question

Mr. Smith left his house at 7:30 a.m and drove at a rate of 50 mph until 10:00a.m He than stopped for half an hour . At what rate must he travel in order to get to work by noon if he still has 105 miles to go

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Solution

Time left = 1.5 hrs
distance that to be covered= 105 miles
=105× 1609.344 m
=168981.12 m
Therefore the rate he must follow
= 168981.12 /1.5
=112654.08 mph

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