Instructions

Study the table below to answer these questions


The Table shows the quantities of minerals exported from India to six different countries A,B,C,D,E and F(in '000 tonnes) in the year 2010.

Question 89

If international demand for coal from India rises by 12%, that of Iron ore by 8% and copper by 15%, by how much percent will total export from India rise, assuming export of Gold and silver remain at the same level?

Solution

International demand for coal from India rises by 12%,

$$\Rightarrow$$ 112%ย of 149 = 166.88

For Iron ore,

$$\Rightarrow$$ 108% of 103 = 111.54

For Copper,

$$\Rightarrow$$ 115% of 75 = 86.25

Total percentage rise in exports from India is given by,

= $$\frac{(111.54 + 166.88 + 132 + 86.25 + 28) - 487}{487} \times 100$$

= $$\frac{524.37 - 487}{487} \times 100$$

= $$\frac{37.37}{487} \times 100$$

= $$7.6$$%

Hence, option D is the correct answer.


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