| Year | Profit or Loss (in Rs. cr) |
| 2011 | 5 |
| 2012 | \[-\]15 |
| 2013 | \[-\]15 |
| 2014 | 15 |
| 2015 | \[-\]10 |
A) Loss of Rs. 30 cr
B) Loss of Rs. 20cr
C) Profit of Rs. 20 cr
D) Profit of Rs. 30 cr
Correct Answer: B
Solution :
Sum of five years \[=\log \,\,[\tan 1{}^\circ \cdot cot1{}^\circ \cdot tan2{}^\circ \cdot cot2{}^\circ ...1]\] Hence, loss of Rs. 20 cr.
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