Chapter 8, Problem 50R

To determine

The percentage contribution of both coal mines in the annual total coal production.

Answer to Problem 50R

The percentage contribution of mine N is $6.64\%$ and mine B is $6.009\%$ in the annual total coal production.

Explanation of Solution

Introduction:

The production per year and total production of the coal from both mines is given. The contribution percentage of the each coal mine estimates on the basis of the per year coal production and total coal production.

Consider the table shown below.

Table 1

Coal Mine	Production per year	Total production	Contribution percentage
N	$6.78\times {10}^7\text{MT}$	$1.02\times {10}^9\text{MT}$	$6.64\%$
B	$6.13\times {10}^7\text{MT}$	$1.02\times {10}^9\text{MT}$	$6.009\%$

Conclusion:

Thus, the percentage contribution of mine N is $6.64\%$ and of mine B is $6.009\%$ in the annual total coal production.