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Convert all measurements to the same units: 45cm = 0.45m In 15m there are 15/0.45 pieces each costing Rs 2. So, Cost = Rs 2 x 15 / 0.45 ~= Rs 66.67
Rs 100 per 8.0 metres = 100/8 Rs per meter. So cost for 3.5 metres, 3.5*100/8 = Rs 43.75
Let the length be x: 17x = 391 x = 23 So length = 23 meters and width = 17 meters Perimeter = 23+23+17+17 = 80 meters Cost = 80*7.50 = rs 600
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1 meter = 100 centimeters