Question

A rectangular plate has length (21.3 +/- 0.2)cm and a breadth of (9.80 +/- 0.10)cm. Calculate the area of the plate and percentage error. (Also find the uncertainty in the area)

Answer 1

Area = l x b =(21.3+/-0.2)cm multiplied by (9.80+/-0.10) cm = (208.74+/-0.02) cm sq.