Question

Use the table of fuel efficiencies for several automobiles to answer the following questions.

Car Model	Fuel Consumption (L/100km)	CO2 emission (g CO2 /km)
Petrol Engines
Peugeot 107	4.6	109
Audi Cabriolet	11.1	266
Chevy Tahoe	14.6	346
Diesel Engines
Peugeot 107	4.1	109
Audi Cabriolet	8.4	223

How many miles are in a kilometer if a mile is 5280 feet, 1 foot is 12 inches, and 1 inch is 2.54 cm?

The petrol engine Peugeot 107 consumes 4.6 L of fuel per 100 km. Express the efficiency in miles per gallon, if a gallon is 3.78 L.

The diesel Cabriolet is more efficient than the petrol Cabriolet. How many metric tons of CO2 are produced by the diesel and petrol cars in 15000 miles of driving? A metric ton is 1 Mg.

Answer 1

1 kilometer=1000m

ft =0.3048 m

1000m= 1000/0.3048 ft=3281 ft

3281 ft correspond to 1 kilometer

5280 ft (1 mil= 5280 ft) correspond to 5280/3281 miles=1.609 km

b) Peugot consumed 4.6 L per 100 km

3.78 L= Gallon

4.6 L correspond to 4.6/3.78=1.22 Gallons

efficiency is 1.22 gallons per 100 km

c) 1500 miles =1500*1.609 km=2414 km

Diesel audi cabriolet consumed 8.4 L per 100 km and produces 223 g CO2/ km

2414 km requires 2414*8.4/100 L of diesel and 223*2414 gm CO2

203 L diesel and 538222 g CO2= 538.222kg =538.222/1000 tons =0.538 tons =0.538 Mg

b) Petrol audi Cabriolet requires 11.1 L per 100 km and produces 109 gm CO2/ km

2414 km requires 2414*11.1/100 L petrol and 109*2414 gm CO2

268 L diesel and 263126 gm CO22= 263.126 kg CO2= 0.263 Tons CO2= 0.263 Mg CO2