Question

There are 20,000 vehicles, operating in a city with an average annual travel of 12,000 km per vehicle. The NO_x emission rate is 2.0 g/km per vehicle. The total annual release of NO_x will be,
1. 4,80,000 kg
2. 4,800 kg
3. 480 kg
4. 48 kg

Answer 1

Correct Answer - Option 1 : 4,80,000 kg

Concept:

Total Annual Emission = Average Annual daily emission per vehicle × Number of Vehicle

Average Annual daily emission per vehicle = Emission per km of travel × Distance traveled (in km)

∴ Total Annual Emission = Number of vehicles × Distance travelled × Rate of emission

Calculation:

Total Annual Emission = Number of vehicles × Distance traveled × Rate of emission

∴ Total Annual Emission = 20000 × 12000 × 2 × 10^-3 (kg) = 480000 kg