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In reducing one's speed from 70 mph to 50 mph, how much of a percentage decrease in stopping distance is realized (to the nearest percent)?

In reducing one's speed from 70 mph to 50 mph, how much of a percentage decrease in-example-1
User Mahdad
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1 Answer

4 votes

we are given relation between speed and distance

distance ( when speed =70mph) is

=328feet

so,
d_1=328

distance ( when speed =50mph) is

=183feet

so,
d_2=183

now, we can find percentage in decrease


=(d_1-d_2)/(d_1)* 100

now, we can plug values


=(328-183)/(328)* 100


=44%...........Answer

User Dgotlieb
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