An invar tape haviong a nominal length of 100ft and a croos -sectional area of 0.005sq in. was standardized under a tesion of 15lb. when the tape was used to measure a line, it was supported for its entire length and was subjected to a tension of 10lb. measured tape length should be corrected by
Is it A adding 0.00357ft aor B subtracting 0.00357 or c Cadding 0.00454ft or D subtracting0.00454ft
which one is correct