62. एक त्रिभुज की परिसीमा 48 मी. है तथा इसकी
भुजाएँ 3:4:5 के अनुपात में हैं। तब त्रिभुज का
क्षेत्रफल होगा:
(A) 240 m2
(B) 120 m2
(C) 160 m2
(D) 96 m2
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Answer:
sides of triangle a, b c
a:b:c=3:4:5
a=(3/12)*48=12
b=(4/12)*48=16
c=(5/12)*48=20
this is an equalateral triangle
so the area of the triangle=(1/2)*height* base
=> area =(1/2)*12*16
=>area=96 m^2
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