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Find the radius of a sphere whose surface area is 154 cm2 [take π = 22/7]

• A. 1.75cm

• B. 3.00cm

• C. 3.50cm

• D. 7.00cm

QUICK ANSWER…

C

SOLUTION…  

Surface area of sphere:

Now for the right answer to the above question:

1. Option A is incorrect.
2. Option B is incorrect.
3. C is correct.
4. D is not the correct answer.

QUICK TIPS…

You may please note these/this:

• Surface area of a sphere is given by 4 times pi times r-square.

Use the questions and answers session to deal further on this topic…

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/ culled from 2018 JAMB-UTME mathematics question 39 /