31. There are four candles which can burnfor 5 hours, 4 hours, 3 hours and 2 hoursrespectively. All of them are lighted at thesame time. They are kept lighted till the time3 candles are finished. If the cost of lightingeach candle is 1-50 per hour, what will bethe total expenditure ?

31. There are four candles which can burnfor 5 hours, 4 hours, 3 hours

1.	31. There are four candles which can burnfor 5 hours, 4 hours, 3 hours and 2 hoursrespectively. All of them are lighted at thesame time. They are kept lighted till the time3 candles are finished. If the cost of lightingeach candle is 1-50 per hour, what will bethe total expenditure ?
Answer» after 4 hrs 3 of them will burn so total cost is (2h+3h+4h+4h)×1.5=13×1.5=19.5Rs