RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)

Subject: Maths - Class 8th

Q. No. 14 of Exercise 21.3

Listen NCERT Audio Books to boost your productivity and retention power by 2X.

14

The walls and ceiling of a room are to be plastered. The length, breadth nad height of the room are 4.5 m, 3 m and 350 cm, respectively. Find the cost of plastering at the rate of Rs. 8 per square metre.

Given,


Length of room = 4.5 m


Breadth of wall = 3 m


Height of wall = 350 cm =


So,


Area of ceiling + area of walls =


=


=


Cost of plastering 1 m2 area = Rs.8


Cost of plastering 66 m2 area = 66 ×8 =Rs.528


Chapter Exercises

More Exercise Questions