The cost of making an article is divided between materials, labour and overheads in the ratio 3 : 4 : 1. If the materials cost Rs. 67.50, the cost of article is?

Rs. 180
Rs. 122.50
Rs. 380
Rs. 540

Correct Answer: Rs. 180

Explanation:

If material cost Rs. 3, the cost of the article is = Rs. ( 3 + 4 + 1) = Rs. 8
If material cost Rs. 67.50, the cost of the article = Rs. (8/3 x 67.5) = Rs. 180

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