The number of buckets on the periphery of a Pelton wheel is given by
A. $$\frac{{\text{D}}}{{2{\text{d}}}} + 5$$
B. $$\frac{{\text{D}}}{{2{\text{d}}}} + 10$$
C. $$\frac{{\text{D}}}{{2{\text{d}}}} + 15$$
D. $$\frac{{\text{D}}}{{2{\text{d}}}} + 20$$
Answer: Option C

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