The pressure on a square plate is measured by measuring the force on the plate and the length of the sides of the plate by using the formula\[P=\frac{F}{{{l}^{2}}}.\]If the maximum errors in the measurement of force and length are 4% and 2% respectively, then the maximum error in the measurement of pressure is
A)1%
B)2%
C)8%
D)10%
Correct Answer:
C
Solution :
Maximum percentage error in p \[\rho =\text{4}%+\text{2}\times \text{2}%=\text{8}%\]