Advertisements
Advertisements
प्रश्न
Find the length of 22 kg copper wire of diameter 0.8 cm, if the weight of 1 cm3 copper is 4.2 g.
Advertisements
उत्तर
Diameter of the wire = 0.8cm
Radius of the wire = 0.4cm
If 4.2g of copper = 1cm3 of copper
Then 22kg copper = `(220000)/(4.2)"cm"^3`
Volume of the copper wire = Area of base x length of wire
`(22000)/(4.2)` = πr2 x h
`(22000)/(4.2) = (22)/(7) xx 0.4^2 xx "h"`
h = `(22000 xx 7)/(4.2 xx 22 xx 0.4 xx 0.4)`
h = 10416.7cm
∴ h = 104.17m
∴ The length of the copper wire is 104.17m.
APPEARS IN
संबंधित प्रश्न
The following figure shows a solid of uniform cross-section. Find the volume of the solid. All measurements are in centimeters.
Assume that all angles in the figures are right angles.
The following figure shows a solid of uniform cross-section. Find the volume of the solid. All measurements are in centimeters.
Assume that all angles in the figures are right angles.
A rectangular cardboard sheet has length 32 cm and breadth 26 cm. Squares each of side 3 cm, are cut from the corners of the sheet and the sides are folded to make a rectangular container. Find the capacity of the container formed.
A rectangular water-tank measuring 80 cm x 60 cm is filled form a pipe of cross-sectional area 1.5 cm2, the water emerging at 3.2 m/s. How long does it take to fill the tank?
The cross section of a piece of metal 2 m in length is shown. Calculate the area of cross section.
The cross section of a piece of metal 2 m in length
is shown. Calculate the volume of the piece of metal.
The figure shows the cross section of 0.2 m a concrete wall to be constructed. It is 0.2 m wide at the top, 2.0 m wide at the bottom and its height is 4.0 m, and its length is 40 m. Calculate the volume of the concrete in the wall
The figure shows the cross section of 0.2 m a concrete wall to be constructed. It is 0.2 m wide at the top, 2.0 m wide at the bottom and its height is 4.0 m, and its length is 40 m. If the whole wall is to be painted, find the cost of painting it at 2.50 per sq m.
The cross section of a tunnel perpendicular to its length is a trapezium ABCD as shown in the figure. AM = BN; AB = 4.4 m, CD = 3 m The height of a tunnel is 2.4 m. The tunnel is 5.4 m long. Calculate the cost of painting the internal surface of the tunnel (excluding the floor) at the rate of Rs. 5 per m2.
The cross section of a canal is a trapezium with the base length of 3 m and the top length of 5 m. It is 2 m deep and 400 m long. Calculate the volume of water it holds.
