Final answer:
To calculate the total painting cost for the wall, we need to know its height. With the height, we could determine the wall's surface area by multiplying the length (15m) by the height, and then calculate the cost at Rs.16 per square meter. Without the height, the cost cannot be determined.
Step-by-step explanation:
To calculate the total cost for painting the entire wall, we need to know the surface area of the wall that needs to be painted. However, the height of the wall is not specified in the question. Let's assume the height of the wall is h meters. The surface area (A) of the wall can be calculated using the formula A = length × height, which in this case is 15m × h. Once we have the value of h, we can calculate A.
Next, to find out the total painting cost, we multiply the surface area A by the cost per square meter. The formula for the total cost (C) is given by C = A × cost per square meter. If the cost is Rs.16 per square meter, the calculation becomes C = 15m × h × 16.
Without the value of the height, we cannot provide an exact figure for the total cost. Therefore, the question is not solvable as it stands and requires further information.