maths help

Hi all.
I need help with these maths questions.
How to work out these three maths questions.

1. John is considering changing his diesel car to an Electric Vehicle (EV) that is battery only. John is looking at a car that has a battery capacity of 27 kilowatt-hours (kWh) of electricity. (Note: a kWh is a unit of energy used by energy companies to measure energy consumption.) If the car requires 1 kWh of energy to drive 4.2 miles, how many miles can he drive following a full charge of the car to its maximum charge level capacity? (Give your answer to one decimal place.)

2. John thinks that his total yearly mileage is likely to be 14 000 miles. He plans to charge the car at night at a cost of 5.89p per kWh. In real-life driving, it’s possible to achieve 3.7 miles per kWh. What would his annual driving costs be if he chose to buy the EV? (Give your answer to the nearest penny.)

3.John will be able to charge his car free of charge while at work. This means that work will pay for the equivalent of 3 910 miles (of electricity costs). What is the percentage of his annual mileage that will be free of charge to him? (Give your answer to one decimal place.)

from
Ross
Original post by rossmack05
Hi all.
I need help with these maths questions.
How to work out these three maths questions.

1. John is considering changing his diesel car to an Electric Vehicle (EV) that is battery only. John is looking at a car that has a battery capacity of 27 kilowatt-hours (kWh) of electricity. (Note: a kWh is a unit of energy used by energy companies to measure energy consumption.) If the car requires 1 kWh of energy to drive 4.2 miles, how many miles can he drive following a full charge of the car to its maximum charge level capacity? (Give your answer to one decimal place.)

2. John thinks that his total yearly mileage is likely to be 14 000 miles. He plans to charge the car at night at a cost of 5.89p per kWh. In real-life driving, it’s possible to achieve 3.7 miles per kWh. What would his annual driving costs be if he chose to buy the EV? (Give your answer to the nearest penny.)

3.John will be able to charge his car free of charge while at work. This means that work will pay for the equivalent of 3 910 miles (of electricity costs). What is the percentage of his annual mileage that will be free of charge to him? (Give your answer to one decimal place.)

from
Ross

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