Let x be the price of single ticket
Return railway ticket = \(\frac{125x}{100}\)
5% of return ticket
= \(\frac{5}{100} \times \frac{125x}{100}\)
= \(\frac{25x}{400}\)
= \(\frac{x}{16}\)
Given,
\(\frac{125x}{100} + \frac{x}{16} = 84\)
Solving for x, we get
x=64
Therefore, the correct option is (A): Rs 64
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?