Question

The length and breath of a rectangular object
are 25 cm and 10cm respectively and were
measured to an accuracy of 0.1 cm. The
percentage error in area is​

Answer 1

$area = length \times breadth$

relative error is given by,

∆A/A=∆L/L +∆B/B

∆A/A=0.1/25 +0.1/10

∆A/A=0.014

percentage error in area=0.014×100=1.4%

I hope this helps ( ╹▽╹ )

Answer 2

Explanation:

here × 100 is for the percentage error