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The length of a rope by which a cow is tethered is increased from 16 m to 23 m. How much additional area can the cow graze now ?

Asked by 28th February 2013, 4:05 PM
Answered by Expert
Answer:
Area grazed by the cow = area of the circle formed with radius equal to the length of the rope.
 
Initially, area greazed by cow = pi (16)^2
If the length of the rope is increased, area grazed by cow = pi * (23)^2
 
Hence, additional area grazed by cow = pi * (23)^2 - pi (16)^2 = 858 m2
Answered by Expert 28th February 2013, 4:44 PM
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