Question

how will you measure the diameter of an icecream ball​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Hint: We will proceed by finding the volume of cone by using the formula V = 13πr2h. As diameter is given, we will find the radius by dividing diameter by 2. We will substitute the values of radius and height in the formula above to find the volume of the cone.

Complete step by step solution: The ice cream cone is in the shape of a cone. The volume of ice-cream that the cone can contain is equal to the volume of the cone. The volume of the cone can be determined after knowing its physical dimensions i.e. radius and height.

Let h be the height of the cone and r be its radius.

As the height of the ice cream cone is given as 12 cm.

So, h = 12cm

The diameter of the cone is given as 7 cm.

We know that the diameter of a cone is twice its radius, implying, the radius will be half of the diameter.

So, r = 72cm

Now, V be the volume of a cone having height h and radius r

We know the formula for the volume of a cone, i.e.

So, V=13πr2h

Substituting, r = 72cm and h = 12cm in the above formula,

V = 13π(72)212cm3

V=13π49412

V = 49πcm3

So, the volume of cone is 49πcm3

Therefore, the volume of ice-cream that the cone can contain is 49πcm3

Note: Students must remember the formula of volume of different 3D objects carefully and do not get confused with radius and diameter of an object. The volumes of various 3D objects are:

Sphere with radius r = 43πr3

Cube with edge a: a3

Cuboid with dimensions l, b, h: l×b×h

Cylinder with height h and radius r: πr2h

These formulae must be remembered to solve the problems.

Explanation:

Radius, r = cm Height, h = 12 cm

Therefore,

1 Volume=₁²h 3

22 X X3 7 7

= 154 cm³