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The length and breadth of a rectangle ar...

The length and breadth of a rectangle are measured as `( a pm Delta a)` and `(b pm Deltab)` respectively. Find : (i) relative error, (ii) absolute error in the measurement of area.

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(i) Relative error is `(pmDeltaA)/(A)=pm[(Deltaa)/(a)+(Deltab)/(b)]`
(ii) Absolute error is
`pmDeltaA=pm((Deltaa)/(a)+(Deltab)/(b))A=pm((Deltaa)/(a)+(Deltab)/(b))ab`
`=pm[(Deltaa)b+(Deltab)a]`
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