The heights of three individuals are in the ratio 4 : 5 : 6. If the sum of the heights of the heaviest and the lightest boy is 150cm more than the height of the third boy, what is the weight of the lightest boy?  Select:	A) 120cm	B) 150cm	C) 160cm	D) 190cm	E) of these
Let the heights of the three boys be 4k, 5k and 6k respectively.   4k + 6k = 5k + 150   =&gt; 5k = 150=&gt; k = 30   Therefore the height of the lightest boy   = 4k = 4(30) = 120 cm.   120cmNSWER:120cm
<result>A</result>
The heights of three individuals are in the ratio 4 : 5 : 6. If the sum of the heights of the heaviest and the lightest boy is 150cm more than the height of the third boy, what is the weight of the lightest boy?