The given bar graph shows the biscuit exports of India over a period of five years. Study the graph and answer the question that follow.

In which two years was the value per tonne equal?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 2008 and 2009
The value per tonne is the ratio of value on the given year to the quantity of that year.
The value per tonne in 2005 = 150 / 100 = 3 / 2
The value per tonne in 2006 = 150 / 75 = 2
The value per tonne in 2007 = 330 / 150 = 11 / 5
The value per tonne in 2008 = 400 / 160 = 5 / 2
The value per tonne in 2009 = 500 / 200 = 5 / 2
The value per tonne is equal in year 2008 & 2009.