a horse is tied with a rope in the center of a square lawn of size 20 centimeter. if the length of rope is 7 centimeter. find the area of the lawn which the horse can graze. also find the ungrazed area of the lawn.
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Answer:
area of ungrazed part of square = area of square - area of quadrant
= side × side - 1/4 × 22/7 ×7 ×7
=20×20 -11×3.5
=400 -38.5
=361.5
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Answer:
For the square,
length ,a =20cm
therefore,area=à^²
=20^2
=400sq.cm
For the quadrant ,
radius,r =7cm
angle (in degree measures),m=90
therefore area=m÷360×πr^2
=90÷360×22÷7×7×7
=38.5cm^2
again
area of the ungrazed lawn=area of the square - area of the grazed part
=(400- 38.5)cm^2
=361.5cm^2
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