2. A cone has volume 12r cubic inches, Its height is 4 inches, What is its radius?

r - 1.69 inches

Step-by-step explanation:

Volume of a cone is

V = πr^2h/3

V - volume of the cone

π - 3.142

h - height of the cone

r - radius of the cone

We are provided with the values of

V - 12

π - 3.142

h - 4

r - ?

Insert the above values into the formula

V = πr^2h/3

12 = 3.142 * r^2 * 4/3

12= 3.142 * 1.33 * r^2

12= 4.189r^2

Divide both sides by 4.189

12 / 4.189 = 4.189r^2/ 4.189

2.865 = r^2

r = square root of 2.865

r = 1.6925 inches

r = 1.69 inches

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step-by-step explanation:

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.