Question

The error in the measurement of the sides of a rectangle is 1%.The error in the measurement of its area is
A 1%
B 1/2%
C 2%
D None of the above​

Answer 1

According to the formula,

Area =l×b

∆A/A=∆l/l +∆b/b

it is given that the error in measurement of the sides of a rectangle is 1%

∆A/A=(1/100+1/100 ) ×100

∆A/A=(2/100 )×100

∆A/A=2%

i hope this helps