Question

the perimeter of a rectangle is 51cm. If the length is 15/2 times its breadth, find the length and breadth of a triangle​

Answer 1

Given a rectangle ;

• Perimeter P = 51cm
• let breadth = b
• then length = 15/2b

Thus perimeter = 2(l+b)

• P = 2(l+b)
• 51 = 2 ( 15b/2 + b )
• 51 = 2 (17b/2)
• 51 = 17b
• b = 3cm

Thus;

• lenght = 15b/2 => 45/2 => 22.5cm
• breadth = b = 3cm

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