The length, the breadth, and the height of a cuboidal room are given as 80 m, 70m, and 80 m, respectively. What will be the total cost of painting the four walls of this room, at the rate of 50 paise per square metre?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. ₹ 12,000
Given:
Length (l) = 80 m
breadth (b) = 70 m
Height (h) = 80 m
Formula used:
Area of four walls = 2 × (l + b) × h
Calculations:
Using equation (1), we get
Area of four walls of the room = 2 × (80 + 70) × 80
= 24000 m2
Required cost = 24000 × 0.5 = ₹ 12,000