Question

How much tape does Jane require to join the roof and the walls, if the walls are in the shape of squares of side 10m? (8 edges of the bottom part,8 edges sidewise and 8 edges of the top of the square wall touching the trapezium)

Answer 1

Answer:

Rs 555

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)

=2×3(5+4)

=6(9)

=54 sq m

Area of the ceiling =l×b

=5×4

=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

Total cost of white washing =74×7.50= Rs 555