Advertisements
Advertisements
प्रश्न
How many bricks of size 22 cm × 10 cm × 7 cm are required to construct a wall 11 m long, 3.5 m high and 40 cm thick, if the cement and sand used in the construction occupy (1/10)th part of the wall?
Advertisements
उत्तर
Volume of each brick = 22 cm × 10 cm × 7 cm
= 1540 cm3
= 0.00154 m3
Volume of wall = l × b × h
= `11m xx 3.5 m xx 40/100 m`
= 11 × 3.5 × 0.4 ...[∵ 1 m = 100 cm]
= 15.4 m3
If 1/10th part of the wall used in cement and sand, then part of wall used by cement and sand remaining = `15.4/10 m^3 = 1.54 m^3`
Remaining part = 15.4 – 1.54 = 13.86 m3
Number of bricks = `"Volume of wall to be construct"/"Volume of each brick"`
= `13.86/0.00154`
= 9000
APPEARS IN
संबंधित प्रश्न
A solid cube of side 12 cm is cut into eight cubes of equal volume. What will be the side of the new cube? Also, find the ratio between their surface areas.
A metal cube of edge 12 cm is melted and formed into three smaller cubes. If the edges of the two smaller cubes are 6 cm and 8 cm, find the edge of the third smaller cube.
A box with lid is made of 2 cm thick wood. Its external length, breadth and height are 25 cm, 18 cm and 15 cm respectively. How much cubic cm of a liquid can be placed in it? Also, find the volume of the wood used in it.
Water in a rectangular reservoir having base 80 m by 60 m i s 6.5 m deep. In what time can the water be emptied by a pipe ôf which the cross-section is a square of side 20 cm, if the water runs through the pipe at the rate of 15 km/hr.
A godown measures 40m × 25 m × 10 m. Find the maximum number of wooden crates each measuring 1.5 m
× 1.25 m × 0.5 m that can be stored in the godown.
Volume of a cuboid is 34.50 cubic metre. Breadth and height of the cuboid is 1.5m and 1.15m respectively. Find its length.
To make an open fish tank, a glass sheet of 2 mm gauge is used. The outer length, breadth and height of the tank are 60.4 cm, 40.4 cm and 40.2 cm respectively. How much maximum volume of water will be contained in it?
The number of bricks each measuring 50 cm × 30 cm × 20 cm that will be required to build a wall whose dimensions are 5 m × 3 m × 2 m is
A covered wooden box has the inner measures as 115 cm, 75 cm and 35 cm and thickness of wood as 2.5 cm. The volume of the wood is ______.
