A) 790 sq. m
B) 850 sq. m
C) 750 sq. m
D) 600 sq. m
E) None of these
Correct Answer: C
Solution :
Explanation Option [c] is correct. \[\operatorname{s}=\frac{1}{2}(25+60+65)=75\] \[\therefore \,\,\,Area\,\,=\,\sqrt{75\,(75-25)(75-60)(75-65)}\] \[=\,\sqrt{75\times 50\times 15\times 10}\] \[=\,\sqrt{15\times 5\times 5\times 10\times 15\times 10}\] \[=15\times 5\times 10=750\,sq.\,m.\]
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