To find the number of pieces of string that can be cut from the woolen rope, we need to divide the length of the rope by the length of each piece of string.
Given:
Length of the woolen rope = 100m
Length of each piece of string = 2.5m
To find the number of pieces that can be cut, we divide the length of the rope by the length of each piece:
Number of pieces = Length of the rope / Length of each piece
Number of pieces = 100m / 2.5m
Number of pieces = 40
Therefore, the correct answer is C) 40, as 40 pieces of string of 2.5m can be cut from the woolen rope.