Question

find x ?

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Answer 1

$area \: of \: trapezium = \frac{1}{2} \times height \times (sum \: of \: parallel \: sides)$

area=480 , height=15 , one side=20

$480 = \frac{1}{2} \times 15 \times (20 + x) \\ 960 = 15 \times (20 + x) \\ 960 \div 15 = 20 + x \\ 64 = 20 + x \\ 44 = x$

the other side x is 44 cm

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