Question

A piece of ribbon of length 65 cm just wraps around a can. Work out the diameter of the can.

A) 10 cm

B) 15 cm

C) 20 cm

D) 25 cm

Answer 1

To find the diameter of a can using a piece of ribbon that just wraps around it, divide the length of the ribbon by π (pi). The given length of 65 cm yields a diameter of approximately 20.7 cm, which suggests the can's diameter is 20 cm, matching option C.

The correct answer is C.

Step-by-step explanation:

The question asks us to calculate the diameter of a can that is wrapped by a 65 cm piece of ribbon. This measurement reflects the circumference of the can, which is the distance around the circle of the can's end. The formula to find the circumference C when the diameter D is known is C = πD, where π (pi) is approximately 3.14159. To find the diameter, we rearrange the formula to D = C/π.

Now, let's use the given circumference of 65 cm to find the diameter:

1. 
   
3. 
   
5. 
   

So, the diameter of the can is approximately 20 cm.