SOLUTION: If one of the parallel sides of a trapezoid (trapezium in the UK) is 2.3 cm, the height is 15 cm and the area 600 sq.cm., what is the length of the other parallel side?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: If one of the parallel sides of a trapezoid (trapezium in the UK) is 2.3 cm, the height is 15 cm and the area 600 sq.cm., what is the length of the other parallel side?      Log On


   

Question 639086: If one of the parallel sides of a trapezoid (trapezium in the UK)
is 2.3 cm, the height is 15 cm and the area 600 sq.cm., what is
the length of the other parallel side?
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
If one of the parallel sides of a trapezoid (trapezium in the UK)
is 2.3 cm, the height is 15 cm and the area 600 sq.cm., what is
the length of the other parallel side?
   A = expr%281%2F2%29%28b%5B1%5D%2Bb%5B2%5D%29h

 600 = expr%281%2F2%29%282.3%2Bb%5B2%5D%29%2815%29

Multiply both sides by 2

1200 = (2.3 + b2)(15)

Divide both sides by 15

  80 = 2.3 + b2

Subtract 2.3 from both sides:

77.7 = b2

Answer: 77.7 cm

Edwin