(b) 20
Actual height = 5 feet 5 inches
= 5 × 12 inches + 5 inches
= 65 inches
Height given by mistake =\(\frac{125}{100}\) x 65 inches
= 81.25 inches
\(\therefore\) Required percentage error
= \(\frac{(81.25-65)}{81.25}\) x 100%
= \(\Big(\frac{16.25}{81.25}\times100\Big)\)% = 20%