The cross elasticity of demand between bus travel and rail travel is +2. If bus fares increase, the demand for rail travel rises by 10%. What change in bus fares has caused this?
- Afrom 20 cents to 21 cents
- Bfrom 30 cents to 33 cents
- Cfrom 40 cents to 45 cents
- Dfrom 50 cents to 60 cents