Same chapter2 marksDifficulty: Easy
Find the area and the circumference of a circle of radius 7 cm. Take π = 22/7.
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2 marksDifficulty: Easy
Find the area of a triangle whose sides are 13 cm, 14 cm and 15 cm.
Original Khojo Papers practice question — not from a past board paper.
Answer
84 cm2
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The semi-perimeter is s = (13 + 14 + 15)/2 = 21. By Heron's formula the area = √[21(21 − 13)(21 − 14)(21 − 15)] = √(21 × 8 × 7 × 6) = √7056 = 84 cm2.
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