The sides of a triangle are in the ratio 5: 12: 13 and its perimeter is 420 m, its area is?
Choose one: A) 150 B) 882 C) 277 D) 210 E) 281
5x + 12x + 13x = 420 =&gt; x = 14   a = 70, b = 168, c = 182   S = (70 + 168 + 182)/2= 
<gadget id="calculator">(70 + 168 + 182)/2</gadget>
<output>210</output>
210   Answer: 210
<result>D</result>
The sides of a triangle are in the ratio 5: 12: 13 and its perimeter is 420 m, its area is?