The area of a circle whose diameter is 1.4 cm is
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The area of a circle whose diameter is 1.4 cm is
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The diameter is 1.4 cm, so the radius is 0.7 cm. The area is pi * r^2 = (22/7) * 0.7 * 0.7 = 22 * 0.07 = 1.54 cm^2.
Using the diameter of 1.4 cm, the radius is r = 0.7 cm. Applying the area of a circle formula, Area = pi times r squared, we get 22/7 times 0.7 times 0.7. This calculates to 1.54 square cm.