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Question 104
Cost of 18 shirts and 45 trousers is Rs 68,400. What is the cost of 10 shirts and 25 trousers ?
Solution
Let the cost of a shirt be S and the cost of a trouser be T.
So, 18S + 45T = 68400
We need to know the value of 10S + 25T.
In order to get that, multiply the above equation by 5/9.
It implies (18S + 45T)*5/9 = 68400*5/9
Or, 10S + 25T = 38000
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