Question

pls answer this question​

Answer 1

Step-by-step explanation:

Q.3 Write true and false.

1. Leaves make food for plant.

2. Friction slows or stops a moving object.

3. Boiling the water kills germs present in it.

4. Drinking water should always be stored in clean containers

5. All planets do not revolve around the sun.

6. Venus is the smallest planet.

7. Venus has two moons.

Answer 2

Answer:

ratio of their volumes is 1 : 3

Step-by-step explanation:

ratio of heights = 1 : 3

let the height of the two cones be y and 3y respectively.

ratio of their radii = 3 : 1

let the radii of two cones be 3x and x respectively.

volume of a cone = 1/3 π r²h

ratio of volume of two cones:

1/3πr²h : 1/3 π r²h

1/3 and π will cancelled becoz their values are equal.

(x)²(3y) : (3x)²y

3x²y : 9x²y

x²y will be cancelled from both sides

3 : 9

= 1 : 3

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