1.

the cost of 5 kg of sugar and 7 kg of rice is rupees 153 and the cost of 7 kg of sugar and 5kg of rice is rupees 147 find the cost of 6 kg of sugar and 10 kg of rice

Answer»

let 1 kg sugar be x , and 1 kg rice be y

5x+7y = 153

7X + 5Y = 147

12 x + 12Y = 153 + 147

12x + 12y = 300

x + 12y = 300/12

x + 12 y = 25

x + y = 25/12

x+y = 2.5

price of 6 kg sugar and 10 kg rice = 2.5 * 6 * 10 = 150





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