Problem: the width of a rectangle is 10 meter and its area is 150 square meter . if length of the rectangle is increased then its new area is 4 / 3 times of the original area . what is the new perimeter of the rectangle ? 
Options: ['a ) 48 m', 'b ) 52 m', 'c ) 54 m', 'd ) 60 m', 'e ) none of these']
d