Question

The length and breadth of a rectangular plate are measured to be 14•5cm and 4• 2cm respectively ,Find it's area to appropriate significant figures

Answer 1

Answer:

here length=14.5

3 significant figures. breadth=4.2

2 significant figure

therefore, Area=14.5×4.2cm^2

=60.90cm^2

the answers should be rounded off two significient figure

therefore,. the digit to be dropped in the answer 60.90 is 9( circled) which is greater than 5. so the preceding zero is raised by 1 .

hence the answer is. = 61cm^2

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