The area of trapezium is 144.5 sq.cm and it's height is 8.5 cm long. If one of the parallel sides is 20.4 cm long,what is the length of the other side?
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3
⊥Let the side be x
∴ Area = 8.5 * (20.4 + x) = 144.5
Sorry electricity cut... had to shut down comp... couldn't complete ans
∴ Area = 8.5 * (20.4 + x) = 144.5
Sorry electricity cut... had to shut down comp... couldn't complete ans
Answered by
9
Height of trapezium(h) = 8.5 cm
One parallel side,a = 20.4 cm
Another parallel side = b cm
Area of trapezium = ½h(a+b)
144.5 = ½(8.5) (20.4+b)
144.5÷½(8.5)= 20.4+b
144.5×2/(8.5) = 20.4+b
17×2 = 20.4+b
34 = 20.4+b
b = 34 - 20.4
b = 13.6
Therefore, the other parallel side is 13.6 cm
One parallel side,a = 20.4 cm
Another parallel side = b cm
Area of trapezium = ½h(a+b)
144.5 = ½(8.5) (20.4+b)
144.5÷½(8.5)= 20.4+b
144.5×2/(8.5) = 20.4+b
17×2 = 20.4+b
34 = 20.4+b
b = 34 - 20.4
b = 13.6
Therefore, the other parallel side is 13.6 cm
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