Question

1. 2 cubes each of volume 64 cm3 are joined end to end. Find the surface

area of the resulting cuboid.

2. The paint in a certain container is sufficient to paint an area equal to
9.375 sq.m. How many bricks of dimensions 22.5 cm × 10 cm × 7.5 cm
can be painted out of this container?

3. The curved surface area of a right circular cylinder is 4.4 sq.m. If the

radius of the base of the cylinder is 0.7 m, find its height.

4. Find the total surface area of a cone, if its slant height is 21 m and

diameter of its base is 24 m.

5. Three cubes each of sides 5 cm are joined end to end. Find the surface

area of the resulting cuboid.

6. In a hot water heating system, there is cylindrical piping of length 28m
and diameter 5 cm. Find the total radiating surface in the system.
7. A joker’s cap is in the form of a circular cone of base radius 7 cm and
height 24 cm. Find the area of the sheet required to make 10 such caps.
8. A rectangular water tank of base 11 m × 6 m contains water up to a
height of 5 m. If the water in the tank is transferred to a cylindrical tank of
radius 3.5 m, find the height of the water level in the tank.

9. A hemispherical depression is cut out from one face of a cubical wooden
block such that the diameter of the hemisphere is equal to the edge of
the cube. Determine the surface area of the remaining solid.

10. A village having a population of 4000 requires 150 litres of water per head
per day. It has a tank measuring 20 m by 15 m by 6 m. For how many
days will the water of this tank last?

11. In one fortnight of a given month, there was a rainfall of 10 cm in a river
valley. If the area of the valley is 97280 km2, show that the total rainfall
was approximately equivalent to the addition to the normal water of three
rivers each 1072 km long, 75 m wide and 3 m deep.

12. A container opened from the top and made up of a metal sheet, in in the
form of a frustum of a cone height 16 cm with radii of its lower and upper
ends as 8 cm and 20 am respectively. Find the cost of milk, which can fill
the container completely at the rate of Rs 20/litre. Also, find the cost of
metal sheet used to make the container, if it costs Rs 8/100 cm 2

Answer 1

Answer:

first question volume of cube is equal to a cube if you put in that root of 64 equal to 24 then length is equal to 8 because length is more than breadth and height is equal to 4 and British is equal to four if you Sab to turn the TSA of cuboid you will get to 160 cm

Answer 2

Answer:

$\huge\mathcal{\fcolorbox{blue}{white}{\red{Answer}}}$

आँसू आ जाते हैं रोने से पहले,

आँसू आ जाते हैं रोने से पहले,ख्वाब टूट जाते हैं सोने से पहले,

आँसू आ जाते हैं रोने से पहले,ख्वाब टूट जाते हैं सोने से पहले,लोग कहते हैं मोहब्बत गुनाह है,

आँसू आ जाते हैं रोने से पहले,ख्वाब टूट जाते हैं सोने से पहले,लोग कहते हैं मोहब्बत गुनाह है,काश...

आँसू आ जाते हैं रोने से पहले,ख्वाब टूट जाते हैं सोने से पहले,लोग कहते हैं मोहब्बत गुनाह है,काश...कोई रोक लेता इसे होने से पहले ।

आँसू आ जाते हैं रोने से पहले,ख्वाब टूट जाते हैं सोने से पहले,लोग कहते हैं मोहब्बत गुनाह है,काश...कोई रोक लेता इसे होने से पहले ।-