Using 22/7 for pi, what is the area of a circle of radius 7 cm?
Answer and explanation
Correct answer: B. 154 square centimetres, from (22/7) x 7 x 7
- Step 1: Area = pi x r squared.
- Step 2: (22/7) x 49 = 22 x 7 = 154.
Answer
154 square centimetres.
Why not the others: 44 is the circumference, 308 uses the diameter in place of the radius, and 49 omits pi.
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