Question

the length and breadth of a rectangle are (5.7±0.1)cm and (3.4±0.2) cm.calculate area of rectangle with error limits.

Answer 1

A=LB
=5.7×3.4
=19.38cm^2
delta A=A×(deltaL/L+dektaB/B)
=19.38×(0.15.7+ 0.2/3.4)
=1.48cm2
area of rectangle =(19.38+1.48)cm2