Question 1 :
Curved surface area of a cone is 308 $cm^2$ and its slant height is 14 cm. Find radius of the base.
Question 2 :
A shopkeeper has one spherical laddoo of radius 5cm. With the same amount of material, how many laddoos of radius 2.5 cm can be made?
Question 3 :
Find the surface area of a sphere of radius 5.6 cm.
Question 4 :
In a cylinder, radius is doubled and height is halved, curved surface area will be _________?
Question 5 :
How many litres of milk can a hemispherical bowl of diameter 10.5 cm hold?
Question 6 :
A cloth having an area of 165 $m^2$ is shaped into the form of a conical tent of radius 5 m. Find the volume of the cone.
Question 7 :
The radii of two cylinders are in the ratio of 2:3 and their heights are in the ratio of 5:3. Find the ratio of their volumes.
Question 8 :
Curved surface area of a cone is 308 $cm^2$ and its slant height is 14 cm. Find the total surface area of the cone.
Question 9 :
State true or false: If the length of the diagonal of a cube is $6\sqrt3$ cm, then the length of the edge of the cube is 3 cm.
Question 10 :
Find the volume of a sphere whose surface area is 154 $cm^2$ .
Question 11 :
State true or false: In a right circular cone, height, radius and slant height do not always be sides of a right triangle.
Question 12 :
State true or false : Cuboid whose length = l, breadth = b and height = h ; Diagonal of cuboid = $6\sqrt{l^{2}+b^{2}+h^{2}}$.
Question 13 :
State true or false: The volume of the largest right circular cone that can be fitted in a cube whose edge is 2r equals to the volume of a hemisphere of radius r.
Question 14 :
Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.
Question 15 :
State true or false: If the edge of the cube is a, then volume of cube = $a^{3}$
Question 16 :
A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior. The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm. If the length of the pencil is 14 cm, find the volume of the wood .
Question 17 :
A cloth having an area of 165 $m^2$ is shaped into the form of a conical tent of radius 5 m. How many students can sit in the tent if a student, on an average, occupies $\frac{5}{7} m^2$ on the ground?
Question 18 :
Figures that can be drawn easily on our notebooks or cardboards are called ________
Question 19 :
The surface area of a sphere of radius 5 cm is five times the area of the curved surface of a cone of radius 4 cm. Find the volume of the cone (taking $\pi=\frac{22}{7}$).
Question 20 :
A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine the cost of sheet for it , if a sheet measuring 1 $m^2$ costs Rs 20.
Question 21 :
A cuboidal water tank is 6 m long, 5 m wide and 4.5 m deep. How many litres of water can it hold? (1 $m^3$ = 1000 $l$)
Question 22 :
The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs 10 per $m^2$ is Rs 15000, find the height of the hall. [Hint : Area of the four walls = Lateral surface area.]
Question 23 :
State true or false : Cuboid whose length = l, breadth = b and height = h ; Volume of cuboid = lbh
Question 24 :
A godown measures 40 m × 25 m × 15 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.
Question 25 :
The lateral surface area of a cube is 256 $m^2$. Find the volume of the cube.