SOLUTION: As part of a Physics experiment students were asked to stretch a spring to extend its length by 40%. If the original length of the spring is 55cm, what should the total length of t

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Question 1148019: As part of a Physics experiment students were asked to stretch a spring to extend its length by 40%. If the original length of the spring is 55cm, what should the total length of the extended spring be?
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the length of the extended spring.
you get x = 55 + .40 * 55 = 55 * (1 + .40) = 55 * 1.40 = 77.
the length of the extended spring will be 77 cm.
the original length of the spring is 55 cm.
the spring is stretched an additional 77 - 55 = 22 cm
22/55 = .4 * 100 = 40%
the spring is stretched by 40% of its original length.