Question

The length, breadth and height of a room 5m,4m and 3m respectively . Find the cost of white washing the walls of the room and celling at the rate of Rs7.50 per meter square

Answer 1

Answer:

Step-by-step explanation:

Length, breadth and height of a room are 5 m, 4 m and 3 m.

Area of four walls of the room = 2h(l + b)

= 2 x 3 (5 + 4)  

= 6(9)

= 54 sq m

Area of the ceiling = l x b

= 5 x 4

= 20 sq cm.

Total area of the four walls and the ceiling of the room

= 54 + 20

= 74 sq cm

Cost of white washing = Rs 7.50 per sq m

Answer 2

CSA OF CUBOID = 2(L+B)×H=2×(5+4)×3=2×9×3=54 CM +AREA OF SQUARE L×B=4×3 =12 =54+12=66 39×7.50=YOUR ANSWER :-)