At the rate of Rs 2 per sq m cost of painting a rectangular floor is Rs 5760 If the length of the fl......

At the rate of Rs. 2 per sq m, cost of painting a rectangular floor is Rs 5760. If the length of the floor is 80% more than its breadth, then what is the length of the

Let the length and the breadth of the floor
be l m and b m respectively.
l = b + 80% of b = l + 0.8 b = 1.8b
Area of the floor = 5760/2 = 2880 sq m
l*b = 2880 
i.e., l * l/1.8 = 2880
l = 72

By: MIRZA SADDAM HUSSAIN