Advertisements
Advertisements
प्रश्न
Three cubes each of side 10 cm are joined end to end. Find the surface area of the resultant figure.
Advertisements
उत्तर
If three cubes each of side 10 cm are joined, then a cuboid will be formed of dimensions 30 cm × 10 cm × 10 cm.

∴ Surface area of the cuboid = `2[lb + bh + hl]`
= 2[30 × 10 + 10 × 10 + 30 × 10]
= 2[300 + 100 + 300]
= 2[700]
= 1400 cm2
APPEARS IN
संबंधित प्रश्न
A plastic box 1.5 m long, 1.25 m wide and 65 cm deep, is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine:
(i) The area of the sheet required for making the box.
(ii) The cost of sheet for it, if a sheet measuring 1 m2 costs Rs 20.
Mary wants to decorate her Christmas tree. She wants to place the tree on a wooden block
covered with coloured paper with picture of Santa Claus on it. She must know the exact
quantity of paper to buy for this purpose. If the box has length, breadth and height as 80
cm, 40 cm and 20 cm respectively. How many square sheets of paper of side 40 cm would
she require?
How many planks each of which is 3 m long, 15 cm broad and 5 cm thick can be prepared from a wooden block 6 m long, 75 cm broad and 45 cm thick?
A cuboidal box is 5 cm by 5 cm by 4 cm. Find its surface area.
10 cubic metres clay is uniformly spread on a land of area 10 ares. the rise in the level of the ground is
The height of a rectangular solid is 5 times its width and its length is 8 times its height. If the volume of the wall is 102.4 cm3, find its length.
The length, breadth, and height of a cuboid (rectangular solid) are 4 : 3: 2.
(i) If its surface area is 2548 cm2, find its volume.
(ii) If its volume is 3000 m3, find its surface area.
The total surface area of a cylinder is 6512 cm2 and the circumference of its bases is 88 cm. Find:
(i) its radius
(ii) its volume
The dimensions of a cuboidal box are 6 m × 400 cm × 1.5 m. Find the cost of painting its entire outer surface at the rate of ₹ 22 per m2.
