Answer:
The cost of the paint will be $123.75.
Explanation:
Since Pranav paints a wall of area 53m ^ 2, and one liter of paint covers an area of 4.5m ^ 2, and paint is sold in 2.5 liter tins, each costing $ 24.75, if Pranav buys the least number of tins to paint this wall, to determine the cost of the paint, the following calculation must be performed: 
 
(53 / 4.5) = liters of paint needed 
11.77 = liters of paint needed 
11.77 / 2.5 = tins of paint needed 
4.71 = tins of paint needed (rounds to 5) 
 
5 x 24.75 = Total cost 
123.75 = Total cost 
 
The cost of the paint will be $123.75.