(1) 30cm2 (2) 60cm2 (3) 30√2cm2 (4) 60√2cm2
Solution:
Semi-perimeter,
s=9+10+11/2 = 15cm
Area of triangle
= √s(s-a)(s-b)(s-c)
=√15(15-9)(15-10)(15-11)
=√15*6*5*4 = 30√2cm2
Then the option is (3) 30√2cm2
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