Answer: 6.
- A 4
- B 6
- C 8
- D 12
Correct answer: B. 6
Explanation: Area = (1/2)|1(4 − 0) + 3(0 − 2) + 5(2 − 4)| = (1/2)|4 − 6 − 10| = 6.
Concept context
Evaluation of determinants, cofactors, adjoint, inverse of matrix, Cramer's rule and area applications. Always in board and JEE.