If the total cost of four tubelights and three bulbs is Rs.260 and the ratio between the cost of a tubelight and a bulb is 5:2 respectively, what is the total cost of one tubelight and six bulbs ?
a) Rs.210
b) Rs. 130
c) Rs. 180
d) Rs. 170
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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 ...
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