The length and breath of a recantangular object are `25.2cm` and `16.8cm` respecitively and have been measured to an accuracy of `0.1cm`. Relative error and percentage error in the area of the object are

Explanation

`"Area" A = l xx b`
l = 25.2cm and `Deltal = 0.1cm`
b=16.8cm and `Deltab=0.1cm`
`:.` Relative error in area
`((DeltaΑ)/(A))=((Deltal)/(l))+((Deltab)/(b))`
`((0.1)/(25.2))+((0.1)/(16.8)) = 0.004 + 0.006 = 0.01`
`((Delta)/(Α)) 100=0.01 xx 100`
Percentage error = 1%