hello friends... pls solve it
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Step-by-step explanation:
A = 480cm² h = 16cm
a:b = 5:7 ⇒ a = 5k b = 7k
A = 1/2 *h(a+b)
480 = 1/2 * 16(5k + 7k)
60 = 12k
k = 5
a = 25cm b = 35cm
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