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For q3a part i, 4 pi is a constant that appears in both spheres so u can ignore it as they will cancel each other out.

Similarly, for part ii, although the formula for volume of sphere is 4/3 pi r cube, u can ignore the 4/3 pi coz it is a constant that is present in both spheres.

For part b, cost of painting the sphere is looking at surface area instead of radius and volume as you are painting the surface of the sphere.

Similarly, for part ii, although the formula for volume of sphere is 4/3 pi r cube, u can ignore the 4/3 pi coz it is a constant that is present in both spheres.

For part b, cost of painting the sphere is looking at surface area instead of radius and volume as you are painting the surface of the sphere.

Date Posted:
10 months ago

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Hello There,

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Working with answer is on YouTube https://www.youtube.com/watch?v=zS_vx03pAKI

If you need help with another question, upload your question as usual and type "need help from Thinking Youths" in the description box and we'll come to your aid.

Or visit www.ThinkingYouths.com to join us.

Date Posted:
10 months ago