Advertisements
Advertisements
प्रश्न
Find the cost of sinking a tubewell 280 m deep, having diameter 3 m at the rate of Rs 3.60 per cubic metre. Find also the cost of cementing its inner curved surface at Rs 2.50 per square metre.
Advertisements
उत्तर
Cost of sinking a tube well = Volume of the tube well x Cost of sinking a tube well per cubic metre
= `22/7` x (1.52) x (280) m3 x Rs 3.6/m3 = Rs 7128.
Cost of cementing = Inner surface area of the tube well x Cost of cementing per square metre = ((2 x `22/7` x 1.5x 280) m2) x Rs 2.5/m2 = Rs 6600
APPEARS IN
संबंधित प्रश्न
Find the surface area of a cube whose edge is 3 cm.
Find the surface area of a cube whose volume is 216 dm3.
Side of a cube is 4.5 cm. Find the surface area of all vertical faces and total surface area of the cube.
Total surface area of a cube is 864 sq.cm. Find its volume.
Three equal cubes are placed adjacently in a row. Find the ratio of the total surfaced area of the resulting cuboid to that of the sum of the total surface areas of the three cubes.
How many bricks will be required for constructing a wall which is 16 m long, 3 m high, and 22.5 cm thick, if each brick measures 25 cm x 11.25 cm x 6 cm?
Find the volume of a cube whose diagonals is `sqrt(48)"cm"`.
If the total surface area of a cube is 2400 cm2 then, find its lateral surface area
The total surface area of a cube is 96 cm2. The volume of the cube is ______.
The lateral surface area of a cube is 256 m2. The volume of the cube is ______.
