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The length and breadth of a rectangular plate are measured to be 14.5 cm and 4.2cm respectively. Find its area to appropriate significant figures. |
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Answer» Here length = 14.5 cm `to` 3 significant figures. breadth =4.2 cm `to` 2 significant figures. `therefore` Area = `14.5xx4.2 cm^2` `=60.90 cm^2` The answer should be rounded off to two significant figures. `therefore` The digit to be dropped in the answer 60. 9 0 is 9 (circled ) which is greater than 5. So the preceding zero is raised by 1. hence the answer `61 cm^2` |
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