The Total solution for NCERT class 6-12
Length of the cord = Circumference of the circular pipe= 2πr = 2 × 3.14 × 4 = 25.12 cmPerimeter of the square box= 4 × side = 4 × 4 cm = 16 cmLength of the cord left= 25.12 cm – 16 cm = 9.12 cmYes, 9.12 cm cord is left.