A standard steel tape of length 30 m and cross-section 15 × 1.0 mm was standardised at 25°C and
at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If
the modulus of elasticity of steel tape is 2.2 × 106
kg/cm2
, the correction to be applied is
(A) - 0.000909 m
(B) + 0.0909 m
(C) 0.000909 m
(D) None of these