A) 9
B) 36
C) \[\sqrt{42}\]
D) \[3\sqrt{15}\]
Correct Answer: D
Solution :
Ratio = 2 : 3 : 4 = 4 : 6 : 8 Perimeter = 18 cm \[\therefore \] Semi-perimeter (s) \[=\frac{4+6+8}{2}=9\] \[\therefore \] Area of triangle \[=\sqrt{s(s-a)(s-b)(s-c)}\] \[=\sqrt{9(9-4)(9-6)(9-8)}\] \[=\sqrt{9\times 5\times 3\times 1}=3\sqrt{5}\,sq\,cm\]You need to login to perform this action.
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