Management Aptitude Test 2018 Paper

(a) Let the length, breadth and height be l , b and h , respectively.
Cost of plastering the four walls = ₹ 48
⇒ 2(l + b) h = 48
Similarly,
Cost of plastering the four walls of new room
= 2(2l+ 2b) (2h) =8 (l+ b) h
= 4 x 2 (l + b)h
= 4 x 48 [∵ 2( l + b) h = 48]
= ₹ 192