The heights of a wall is six times its width and the length of the wall is seven times its height. If volume of the wall be 16128 cu .m, its width is
Choose the correct answer:
A) 4 m  B) 4.5 m  C) 5 m  D) 6 m  E) None
Solution   Let the width of the wall be x metres.   Then, Height = (6x)m and length= (42x)m.   42x × x ×6x	= 16128   x3‹=› (16128 / 42 × 6)= 64   ‹=› x= 4.   4 mnswer 4 m
<result>A</result>
The heights of a wall is six times its width and the length of the wall is seven times its height. If volume of the wall be 16128 cu .m, its width is