1. If the total cost of four tube lights and three bulbs is Rs. 260 and the ratio between the cost of a tube light and a bulb is 5 : 2 respectively, what is the total cost of one tube light and six bulbs ‘?






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  • By: anil on 05 May 2019 01.20 am
    Let the cost of tube light be 5x and a bulb be 2x . Given that , (4 * 5x) + (3 * 2x) = 260 => 26x = 260 x = 10 Cost of 1 tube light and 6 bulbs = 5x + (6 * 2x) = 17x = 17 * 10 = 170
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