1. The radius of a circular room is 21 metre. What will be the cost of carpeting the floor at the rate of Rs. 14 per square metre ?






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  • By: anil on 05 May 2019 01.43 am
    Radius of room = 21 m => Area of room = $$pi r^2$$ = $$frac{22}{7} imes (21)^2 = 22 imes 3 imes 21$$ = $$1386 m^2$$ Cost of carpeting $$1 m^2 = Rs. 14$$ => Cost of carpeting $$1386 m^2 = 14 imes 1386$$ = $$Rs. 19,404$$
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