Question

consider a cylinder of height 4cm and the perimeter of the base circle 3 cm . P is a point on the lower rim and q is the point vertically above p onthe upper rim . a thread is wound once round the cylinder starting at p and ending at q . what is the lenght of the thread. ..................................................... plzz anwser.

Answer 1

Answer:

The length of the thread is 120cm.

Step-by-step explanation:

Let the thickness of the thread be 1 mm.

Therefore number of turns made by the thread =(height of the cylinder÷ thickness of thread) =40 cm/1 mm= 40mm/1mm= 40 turns.

Perimeter of the base circle = 3cm.

Therefore total length of 40 terns =40×3cm=120cm.

Therefore the length of the thread is 120cm.

Answer 2

Answer:

The answer should be 5 because 3+2 = 5.