Question

The energy expenditure value of traveling by car is 3.6 MJ/passenger-kilometer. The value for traveling by train is 1.1 MJ/passenger-kilometer. For 1 person making a trip of 1000 km, the train is:

a) Approx 1/3 more efficient
b) Not at all more efficient
c) Approx 2 times more efficient
d) Approx 3 times more efficient

Answer 1

The train is approximately 2 times more efficient than the car for a trip of 1000 km.

Step-by-step explanation:

The energy expenditure value of traveling by car is 3.6 MJ/passenger-kilometer, and the value for traveling by train is 1.1 MJ/passenger-kilometer.

To determine which mode of transportation is more efficient for 1 person making a trip of 1000 km, we need to compare the energy used by each mode.

The energy used by the car would be 3.6 MJ/passenger-kilometer * 1000 km = 3600 MJ.

The energy used by the train would be 1.1 MJ/passenger-kilometer * 1000 km = 1100 MJ.

Therefore, the train is approximately 2 times more efficient than the car.