Advertisements
Advertisements
प्रश्न
A village having a population of 4000 requires 150 litres of water per head per day. It has a tank measuring 20 m × 15 m × 6 m. For how many days will the water of this tank last?
Advertisements
उत्तर
Given that
Length of the cuboidal tank(l)=20m
Breath of the cuboidal tank (b) = 15m.
Height of cuboidal tank (h)=6 m
Height of the tank`=lxxbxxh=(20xx15xx6)m^3`
`=1800m^3`
`=1800000 liters.`
Water consumed by people of village in one day
`=4000xx150 litres.`
`=600000 litres.`
Let water of this tank lasts for n days
Water consumed by all people of village in n days = capacity of tank
`nxx600000=1800000`
`n=3`
Thus, the water of tank will last for 3 days.
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.
If V is the volume of a cuboid of dimensions a, b, c and S is its surface area, then prove that
`1/V=2/S(1/a+1/b+1)`
The breadth of a room is twice its height, one half of its length and the volume of the room is 512cu. m. Find its dimensions.
Three metal cubes with edges 6 cm, 8 cm and 10 cm respectively are melted together and formed into a single cube. Find the volume, surface area and diagonal of the new cube.
How many cubic centimeters of iron are there in an open box whose external dimensions are 36 cm, 25 cm and I 6.5 cm, the iron being 1.5 cm thick throughout? If I cubic cm of iron weighs 15g, find the weight of the empty box in kg.
A rectangular tank is 80 m long and 25 m broad. Water flows into it through a pipe whose cross-section is 25 cm2, at the rate of 16 km per hour. How much the level of the water rises in the tank in 45 minutes.
A child playing with building blocks, which are of the shape of the cubes, has built a structure as shown in Fig. 18.12 If the edge of each cube is 3 cm, find the volume of the structure built by the child.
A wall of length 10 m was to be built across an open ground. The height of the wall is 4 m and thickness of the wall is 24 cm. If this wall is to be built up with bricks whose dimensions are 24 cm × 12 cm × 8 cm, How many bricks would be required?
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?
