Question 176
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 ‘?
Solution
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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