Hard Math Class 9 Level 3

A chord of length 40 cm is 9 cm away from the centre. What is the correct radius?

40 cm लंबी जीवा केंद्र से 9 cm दूर है। सही त्रिज्या क्या होगी?

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Correct Answer

A. √481 cm / √481 cm

Explanation

Half the chord is 20 cm so radius = √(20² + 9²) = √481 cm.

जीवा का आधा 20 cm है इसलिए त्रिज्या √(20² + 9²) = √481 cm होगी।

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