The sides of the triangle are in the ratio 5:6:7 and its perimeter is 720cm. The length of the longest side is? Pick
A) 150cm	B) 200cm	C) 162cm	D) 220cm	E) 280cm
Ratio of sides = 5:6:7   Largest side = 720*7/18= 
<gadget id="calculator">720*7/18</gadget>
<output>280</output>
280cm   Answer is 280cm
<result>E</result>
The sides of the triangle are in the ratio 5:6:7 and its perimeter is 720cm. The length of the longest side is?