they travelled 551 km from Bagani to Zimbabwe N.R at an average speed of 75km/h and their car has an average petrol consumption of 12 litres per 100 km . calculate the following .
1. the time that it will take them to complete the journey , convert to hours & minutes .
2. the amount that they will spend on petrol if the petrol costs is R7.25 per litre ?
a] the time that it will take them to complete the journey , convert to hours & minutes . Time=(distance)/(speed) distance=551 speed=75 km/h thus time=551/75=7 26/75 hours =7 hours (26/75×60) min =7 hours 21 min
2] the amount that they will spend on petrol if the petrol costs is R7.25 per litre ? Total amount spent on petrol will be as follows: Cost of petrol R7.25 per Km Consumption=12 liters per 100 km thus amount of liters used: 12/100×551 =66.12 liters thus total cost of petrol used: 66.12×7.25 =R479.37
