Question

The distance around a circular lampshade is 219.8 mm. If Gail measures straight across the center of the lampshade from one side to the other, what is the longest distance she could measure?

48 mm
55 mm
35 mm
70 mm

Answer 1

i am not sure i am correct, but you could probly figure out like this: 219.8 / 3.14, to get 70

Answer 2

Answer: Longest distance she could measure is 70 mm

Explanation:

To find the longest distance from one side to other across the center we have to find the diameter of the lampshade.

As it is given that the distance around the lampshade is 219.8 mm which is equal to the circumference of the lampshade.

Circumference of the lampshade is
`=` πD, where D is the diameter of the lampshade

`219.8= 3.14D` where the value of π=3.14

Divide both sides by 3.14 we get

`(219.8)/(3.14) = D`

on solving we get

`D = 70`