mensuration class 10

If the base of the triangle is doubled and height is halved, its area will be _____

• Doubled
• Halved
• one-fourth
• Same

Tags

CCSS.K.MD.A.1

Two cubes with 9 cm edge are joined end to end. Find the length of the newly formed solid.

• 18 cm
• 9 cm
• 27 cm
• None of the above

Tags

CCSS.K.MD.A.1

CCSS.K.OA.A.1

CCSS.K.OA.A.2

The formula to find the curved surface area of a right circular cylinder =

• $\pi r^2$

• $\pi r^2h$

• $2\pi rh$

• $2\pi r\left(h+r\right)$

The formula to find the volume of a hemisphere =

•  $2\pi r^2$ 

•  $4\pi r^2$  

•  $\frac{4}{3}\pi r^3$  

•  $\frac{2}{3}\pi r^3$ 

If two solid hemisphere of same base radius r units are joined together along the their bases then curved surface area of this new solid is

• 14πr2

• 6πr2

• 3πr2

• 8πr3

If the radius of the base of a cone is tripled and the height is doubled then the volume is

• Made 6 times

• Maid 18 times

• Maid 12 times

• Unchanged

A solid sphere of radius x cm is melted and cast into a shape of a solid cone of same radius height of the cone is

• 3x

• X

• 4x

• 2x

Shuttlecock used for playing badminton has the shape of the combination of

• A cylinder and sphere

• Hemisphere and cone

• Sphere and cone

• Frustum of a cone and hemisphere

the volume of the greatest sphere that can be cut off from a cylindrical log of wood of base radius 1 cm and height is 5cm

• 4/3π

• 10/3π

• 5π

• 20/3π

The ratio of the volumes of a cylinder cone and sphere if each has the same diameter and same height is

• 1:2:3

• 2:1:3

• 1:3:2

• 3:1:2