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If 22.5 m of cloth costs Rs. 1350. What is the cost of 634 m of cloth?

Answer
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Hint: Here, we will find the price of 1 metre of cloth using the information given in the question. We will find the improper fraction representation of 634 .Then we will multiply the improper fraction with the price per metre of the cloth to find cost of 634 m of cloth.

Complete step-by-step answer:
We know the cost of 22.5 metres of cloth. We will use the unitary method to find out the cost of 634 metres of cloth.
First, we will find the cost of 1 metre of cloth. As 22.5 metres of cloth costs Rs. 1350 dividing 1350 by 22.5 will give us the price of cloth per metre.
Cost of 1 metre cloth =135022.5
We will remove the decimal in the denominator by multiplying the numerator by 10:
Cost of 1 metre cloth =13500225
Factorizing the numerator and denominator, we get
Cost of 1 metre cloth =60×9×259×25
We will cancel out the common factors and find the price of 1 metre of cloth. Therefore, we get
Cost of 1 metre cloth =60
The price of 1 metre of cloth is Rs. 60.
We need to find the price of 634 metres of cloth. First, we will convert 634 into an improper fraction. We will substitute 6 for a , 3 for b and 4 for c in the formula ac+bc to convert a mixed fraction into an improper fraction:
634=(6×4)+34634=274
We need to find the price of 274 metres of cloth. We will multiply price of 1 metre of cloth by 274 :
Cost of 274 metre cloth =274×60
Simplifying the terms, we get
Cost of 274 metre cloth =27×15=405
The price of 634 metres of cloth is 405 rupees.

Note: We can also find the price by using the formula x×pl where x is the length of cloth whose price has to be found and p is the price of cloth of length l :
price=274×135022.5price=405

To convert a mixed fraction into an improper fraction, we need to multiply the whole number with the denominator and add the numerator. The result obtained will be the numerator of the required improper fraction and its denominator will be the same as the denominator of the mixed fraction; that is abc is equivalent to the improper fraction ac+bc .
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