A ball is dropped from rest from a height of 1 m in a frictionless tube as shown in the figure

Q. A ball is dropped from rest from a height of 1 m in a frictionless tube as shown in the figure. If the tube profile is approximated by two straight lines (ignoring the curved portion), the total distance travelled (in m) by the ball is ______________________(correct to two decimal places).

Ans: 2.40-2.42