Question
The inner-radius of a triangle is 5 cm, and the sum of
lengths of its sides is 60 cm. What is the area of the triangle (in sq. cm.)?Solution
Semi perimeter S = 60/2 = 30 cm Inner radius = Area of triangle/S ⇒ 5 = A/30 ⇒ Area = 150 sq. cm.
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- Select the letter-pair that can replace the question mark (?) in the following series?
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57, 59, 56, 61, 54, ___
