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Q.

Cardboard is 4.5 m long and 3.5 m wide. What is the cost of painting it on both sides at the rate of Rs. Question Image per is?


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a

30.0

b

39.38

c

31.39

d

zero 

answer is B.

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Detailed Solution

Concept- To solve the question, we have to calculate the area of the given cardboard to calculate the portion of the area to be painted. The obtained value when multiplied by the rate of cost of painting, will give us the total cost of painting the cardboard.
Cost =Question ImageQuestion ImageQuestion ImageQuestion ImageQuestion ImageQuestion ImageHence, the correct option is 2.
 
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Cardboard is 4.5 m long and 3.5 m wide. What is the cost of painting it on both sides at the rate of Rs. per is?