if the length and breadth of a room are increased by y feet each , the perimeter increases by 16 feet . find y
2 ( l + b ) = x ; 2 ( l + y + b + y ) = x + 16 ; 2 ( l + b ) + 4 y = x + 16 ; x + 4 y = x + 16 ; y = 4 answer : d
divide(16, const_4)