Advertisements
Advertisements
प्रश्न
Hameed has built a cubical water tank with lid for his house, with each other edge 1 .5 m long. He gets the outer surface of the tank excluding the base, covered with square tiles of side 25 cm. Find how much he would spend for the tiles, if the cost of tiles is Rs. 360 per dozen.
Advertisements
उत्तर
Given that
Hameed is giving 5 outer faces of the tank covered with tiles he would need to know the
surface area of the tank, to decide on the number of tiles required.
Edge of the cubic tank = `1.5m=150cm=a`
Area of each square tile = `("surface area of tank")/("area of each title")`
`=(5xx150xx150)/(25xx25)=180`
`("Cost of 1 dozen tiles i.e., cost of 12 tiles = Rs. 360")`
`("Therefore, cost of 12 balls tiles = Rs. 360")`
`∴"cost of one title" = (360)/(12)=rs.30`
`∴ The cost of 180 title= 180xxRs.30`
`=Rs.5.400`
APPEARS IN
संबंधित प्रश्न
A cuboidal vessel is 10 cm long and 5 cm wide. How high it must be made to hold 300 cm3 of a liquid?
An 8 m long cuboidal beam of wood when sliced produces four thousand 1 cm cubes and there is no wastage of wood in this process. If one edge of the beam is 0.5 m, find the third edge.
The perimeter of a floor of a room is 30 m and its height is 3 m. Find the area of four walls of the room.
The cost of preparing the walls of a room 12 m long at the rate of Rs 1.35 per square metre is Rs 340.20 and the cost of matting the floor at 85 paise per square metre is Rs 91.80. Find the height of the room.
Three cubes of each side 4 cm are joined end to end. Find the surface area of the resulting cuboid.
The surface area of a cuboid is 1300 cm2. If its breadth is 10 cm and height is 20 cm2, find its length.
If the areas of the adjacent faces of a rectangular block are in the ratio 2 : 3 : 4 and its volume is 9000 cm3, then the length of the shortest edge is
Find the length of each edge of a cube, if its volume is :
(i) 216 cm3
(ii) 1.728 m3
The capacity of a rectangular tank is 5.2 m3 and the area of its base is 2.6 x 104 cm2; find its height (depth).
External dimensions of a closed wooden box are in the ratio 5:4:3. If the cost of painting its outer surface at the rate of Rs 5 per dm2 is Rs 11,750, find the dimensions of the box.
