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The cost of apple and grapes are between Rs 20 and 30 per kg. If total cost of 5 Kg apple and 7 Kg grapes is a number X having unit's and hundred's place equal and sum of cost of 1 Kg apple and 1 Kg grapes is Rs 50.
Then what is the value of X?
As sum of cost of 1 Kg apple and 1 Kg grapes is Rs 50
By trial and error method
1 kg apple = 29
1 kg grapes = 21
So 29*5 + 21*7 = 292
Answer is 292 , so that unit's and hundred's place is equal
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How many kilogram of sugar costing Rs. 9 per kg must be mixed with 27 kg of sugar costing Rs. 7 per kg so that there may be a gain of 10% by selling the mixture at Rs. 9.24 per kg?
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