$d_T = d_M \pm E$
$d_T = d_M \pm \dfrac{d_M}{L_t} \cdot e$
Where
dT = true distance
dM = measured distance
E = total error = Ne
N = number of tape lengths = dM/Lt
Lt = length of tape as marked
e = error per tape length (too long or too short)
± = (+) for tape too long, (-) for tape too short
Hence,
$d_T = 160.42 + \dfrac{160.42}{50}(0.02)$
$d_T = 160.484 ~ \text{m}$ ← answer