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A calf is tied with a rope of length 6 m at the corner of a square grassy lawn of side 20 m. If the length of the rope is increased by 5.5m, find the increase in area of the grassy lawn in which the calf can graze

NCERT Class X
Mathematics - Exemplar Problems

Chapter _AREA RELATED TO CIRCLES

Answer :

akashnilroy
Increase in area = 1/4*22/7*( (11+5.5)(11+5.5) - 6*6) cm2
= 1/4*22/7*(272.25 - 36)cm2
= 1/2*11/7*236.25 cm2
= 185.625 cm2

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