A PLANT WOUND ITSELF EXACTLY 5 TIMES AROUND A POLE WITH HEIGHT 1 M...

21. A plant wound itself exactly 5 times around a pole with height 1 m and circumference 15 cm as shown in

the picture.

As it climbed, its height increased at a constant rate. What is the length of the plant?

(A) 0.75 m (B) 1.0 m (C) 1.25 m (D) 1.5 m (E) 1.75 m