Advertisements
Advertisements
प्रश्न
A closed iron tank 12 m long, 9 m wide and 4 m deep is to be made. Determine the cost of iron sheet used at the rate of Rs. 5 per metre sheet, sheet being 2 m wide.
Advertisements
उत्तर
Given length =12,m Breadth = 9m and Height = 4m.
Total surface area of tank`=2(lb+bh+hl)`
`=2[12xx9+9xx4+12xx4]`
`=2[108+36+48]`
`=384m^2`
`"Now length of iron sheet"=(384)/("width of iron sheet" )`
`=384/2=194m.`
Cost of iron sheet = length of sheet xx cost rate
`=192xx5=Rs.960`
APPEARS IN
संबंधित प्रश्न
The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m2.
A tea-packet measures 10 cm × 6 cm × 4 cm. How many such tea-packets can be placed in a cardboard box of dimensions 50 cm × 30 cm × 0.2 m?
The volume of a cuboidal box is 48 cm3. If its height and length are 3 cm and 4 cm respectively, find its breadth.
A swimming pool is 20 m long 15 m wide and 3 m deep. Find the cost of repairing the floor and wall at the rate of Rs 25 per square metre.
If V is the volume of a cuboid of dimensions a, b, c and S is its surface area, then prove that \[\frac{1}{V} = \frac{2}{S}\left( \frac{1}{a} + \frac{1}{b} + \frac{1}{c} \right)\]
The dimensions of a cinema hall are 100 m, 50 m and 18 m. How many persons can sit in the hall, if each person requires 150 m3 of air?
If each edge of a cube, of volume V, is doubled, then the volume of the new cube is
If each edge of a cuboid of surface area S is doubled, then surface area of the new cuboid is
The curved surface area of a cylinder of height 14 cm is 88 cm2. Find the diameter of the base of the cylinder.
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
