MATH SOLVE

3 months ago

Q:
# 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 ?

Accepted Solution

A:

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

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