parveen has constructed a cubical water tank with lid for her house with each outer edge 300cm long. she gets the outer four walls and the lid covered with square tiles of side 20cm. Find the amount she spent for tiles, if the cost of one tile is ₹40.
Answers
The amount praveen spends on tiles is Rs.45000
- The problem requires us to find out the surface area of the tank
- its a cube with each side 300cm long
- He wouldn't tile the bottom of the tank, so we need to find the surface area of this cube without the bottom
- surface area of the cube is given by A = 6 a^2
But here we are covering only 5 sides,
-so our formula is A = 5 a^2
This evaluates to 45 m^2
- If our tile is of size 20cm (0.2m) , its area is given by A_tile = 0.04 m^2
-No of tiles required to tile the tank, N = A / A_tile = 1125 tiles
- each tile costs Rs.40
-Therefore 1125 tiles costs, 1125*40 = Rs.45000
Answer:
ashima has constructed a cubical water tank with lid for her house with each outer edge 300 cm long. she gets the inner four walls and the lid covered with square tiles of side 20 cm . find the amount she spent on tiles , if it is given that the cost of 4 tiles is rs. 160.