Question

The length of a rectangular plate measured as 10cm by vernier scale of least count 0.01cm,and its breadth as 5cm by the same scale.The % error in area is

Answer 1

The relative of error in length l is

0.01 10 =0.001



and relative error in the breadth



0.01

=0.002

5



. So the total relative error is



0.001+0.002=0.003=0.3%