Equator Problem

[Dee-M-See]

If a rope stretched out along the Equator until it meets was 40,075 km in length,
How much longer would the rope be if it was suspended 2 metres in the air above the Equator?

[x-ray]

It would be 4 x 3.1416 metres (approx 12.5 metres) longer
I think

[zigzag.]

think x-ray may be a little short lol

[sddsddean]

Beat me to it x ray! It sounds like it should be longer, but you only need the extra 12 odd metres.

[x-ray]

circumference of a circle is Pi x diameter, therefore if diameter is increased by 4 metres the circumference would increase by 4 x pi

[Dee-M-See]

x-ray why would it increase by four when ir is only two metres above the equator?

[x-ray]

2 metres each side. Draw a circle, then another one 2 metres above it. The radius is increased by 2 metres, but the diameter is increased by twice the radius (4 metres)

[Dee-M-See]

Thank you for your answers I am useless at maths!!

[Tichfield]

Assuming that the equator is a perfect circle - which I am not sure it is.