A car owner buys petrol at the rate of Rs 62.50, Rs 52.50 and Rs 57.50 per litre for three successive years. What is the average rate per litre of petrol, if he spends Rs 24150 each year?
Rs. 57.21
Petrol was bought: 24150/62.5=386.4 liters 24150/52.5=460 liters 24150/57.5=420 liters Total money spent: Rs. 24150x3=Rs. 72450 Total petrol bought: 386.4+460+420= 1266.4 liters Average rate: 72450/1266.4= Rs. 57.21
A car owner buys petrol at Rs.7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?
A library has an average of 510 visitors on Sunday and 240 on other day. What is the average number of visitors per day in a month of 30 days whose beginning with Monday?
A library has an average of 510 visitors on Sundays and 240 on other days. What is the average number of visitors per day in a month of 30 days beginning with a Sunday?
