I got this right - and its seems very straightforward, however, my answer was not coming right - I chose this because it was similar to what i was getting ... this is how I did it -- any thoughts ?
Area of metal frame = area of big ring - area of small ring
= PI (r+s)^2 - PI (r)^2
= PI { r^2 + s^2 + 2rs - r^2 }
= PI { s^2 + 2rs }
= PI*s (s + 2r)
There is no such answer ....
Area of metal frame = area of big ring - area of small ring
= PI (r+s)^2 - PI (r)^2
= PI { r^2 + s^2 + 2rs - r^2 }
= PI { s^2 + 2rs }
= PI*s (s + 2r)
There is no such answer ....
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