Case Study-2 : Herman has a single storey house. He decided to construct a new second storey in his house. For the construction he gave contract to a building contractor. After few days of construction he observed that there is a defect in staircase construction, like few stairs are big, few are small, all steps are not of same size. Here is teh staircase as shown in fig., connecting points A and B. Measurements of each steps are marked in the figure.

Find the length of the straight line A and B.

Options

A. 10 units
B. 12 units
C. 6 units
D. 8 units

Answer

A