1. Radius of a circular garden is 7 metre more than length of a rectangle whose perimeter is 364 metre and breadth is 84 metre. What will be cost of fencing the garden (only at the circumference), if the cost of fencing is Rs. 8 per metre ?
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By: anil on 05 May 2019 01.23 am
Perimeter of rectangle = 364 metre => $$2 (l + b) = 364$$ => $$l + 84 = frac{364}{2} = 182$$ => $$l = 182 - 84 = 98$$ metre $$ herefore$$ Radius of circular garden = 98 + 7 = 105 metre Circumference of garden = $$2 pi r$$ = $$2 imes frac{22}{7} imes 105$$ = $$30 imes 22 = 660$$ metre $$ herefore$$ Cost of fencing = $$660 imes 8$$ = Rs. $$5,280$$
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