Question

40 cm
50 cm
40 cm
40 cm
(i)
Fig. 14.16
The dimensions of an oil tin are 26 cm x 26 cm x 45 cm. Find the area of tin sheet
required to make 20 such tins.
A swimming pool is 20 m in length, 15 m in breadth, 4 m in depth. Find the cost
of cementing its floor and walls at 35 per m2.
A cubical box with lid has a length of 30 cm. Find the cost of painting the inside
and outside of the box at * 5.50 per m².
Two cubes of side 4 cm are fixed together. Find the total surface area of the new
solid formed.
Right Circular Cylinder
Tin can, road-roller, circular pillar are some familiar examples of a cylinder. An outli
given in the figure 14.17.​

Answer 1

Answer:

• (1.)ans....-
• length=26cm
• breadth= 26cm
• height=45cm

since ...

total surface area of cuboidal tin =2(lb+bh+lh)

now., 2(26*26+26*45+26*45) *20.

=107796cm.sq.

=107796cm.sq.hence ,the area of the tin required is 107796cm.sq.

hope it's helpful.