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Hard maths question suvat

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1. Cyclist travelling w/ constant acceleration passes 3 points A, B and C. AB = CD = 20M. The speed of a cyclist at A is 8m/s and at Bis 12m/s. What is its speed at c?
2. v=sqrt(u^(2)+2as) so v = 15ms^(-1) to 2 S.F.
3. (Original post by IGCSETANK)
Cyclist travelling w/ constant acceleration passes 3 points A, B and C. AB = CD = 20M. The speed of a cyclist at A is 8m/s and at Bis 12m/s. What is its speed at c?
Work out the time with from A to B with and then find the acceleration. Then just use for the final speed.

These aren't even the hard SUVAT questions...
4. I don't feel your question gives enough information as what is the relevance of the distance CD? I assume in the question you mean AB=BC in which case.

Assuming the above is correct:
v^2 = u^2+2as can be used with the initial parameters to get a acceleration. It can also be used again to find the speed at v. Using this assumption, I got the value of sqrt(224) which I hope helps.

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