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If the length and beradth of a plate a...

If the length and beradth of a plate are `(5.0 +- 0.2)cm` and `(4.0 +- 0.1)cm` the the absolue error in measurment of area is...

A

`10 cm^2`

B

`11 cm^2`

C

`12 cm^2`

D

`1.3 cm^2`

Text Solution

Verified by Experts

The correct Answer is:
D
`A = lb implies (DeltaA)/(A) = (Deltal)/(l) +(Deltab)/(b) implies DeltaA = A [(Deltal)/(l) + (Deltab)/(b)]`
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NARAYNA-UNITS AND MEASUREMENTS-EXERCISE -I (H.W)
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  4. If the length of a cylinder is measured to be 8.28cm with an error of ...

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  12. When Energy is expressed in erg the no of significant figure is four. ...

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  19. When 57.986 is rounded off to 4 significant figures, then it becomes....

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