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The diameter ofa sphere is 4.24 m. Calculate its surface area with due regard to significant figures . |
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Answer» Solution :Diameter d=4. 24 m Radius r `=(d)/(2) = (4.24)/(2) = 2.12` surface AREA of SPHERE = `4pi r^(2)` `= 4xx3.1428xx2.12xx2.12` In the above multiplication 2.12 has 3 significant figures. Hence 3.1428 is rounded off to have 3 + 1 =4 significant figures. It BECOMES 3.143. Surface area `=4xx3.143xx2.12xx2.12=56.50` 56.50 this to be rounded off to have 3 significant figures. `:. `Area is `56.5m^(2)` |
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