a circular disc rolls down a length of 1.76 km making excatly 400 revolutions .what is the area of the disc
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Distance travelled in 1 revolution = circumference of the disc.
1760/400 = 2*22/7 * r
r = 0.7 m
Area of disc = πr²
= 22/7 * 0.7 * 0.7
= 1.54m²
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