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two bases of a trapezium are in ratio 2:5 given its height is 40 and area is 2800. find the length?

2007-02-10 20:43:39 · 1 answers · asked by Anonymous in Education & Reference ➔ Homework Help

1 answers

base 1 is 2x
base 2 is 5x

Area = 1/2(b1 + b2)(height)

2800 = 1/2 (2x + 5x)(40)
2800 = 20 (7x)
2800 = 140x
2800/140 = x
20 = x

b1 = 2x = 40
b2 = 5x = 100

2007-02-10 22:10:17 · answer #1 · answered by Grover 3 · 0⤊ 0⤋

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