Question

The cost of whitewashing the 4 walls of a room is Rs. 300. The cost of white washing the room thrice in length, breadth and beight is

• A. 2800
• B. 2450
• C. 3100
• D. 2700

Answer 1

Answer:

D. 2700

Area of 4 walls = 2(i+b)h Length of second room = 3i Breadth of second room = 3b Height of second room = 3h Area of second room = 2(3i+3b) 3h = 9 x 2 (i+b)h Cost of whitewashing the 4 walls with area 2(i+b)h = 300 Cost of whitewashing for 4 wall of a room thrice in length, breadth and height =9x300-2700