Correct Answer - Option 4 : Rs. 105
Given:
Shrinesh office floor made up of 2800 marbles
Length of floor = 3 cm = 0.03 m
Breadth of floor = 5 cm = 0.05 m
Formula used:
Area of rectangle = length × breadth
Calculation:
Area of rectangle = (0.03 × 0.05) m2
⇒ 0.0015 m2
Now,
⇒ (0.0015 × 2800) m2
⇒ 4.2 m2
Cost of polishing the floor = Rs. (25 × 4.2)
⇒ Rs. 105
∴ The cost of polishing the floor is Rs. 105