A dog start chasing to a cat 2 hour later It...

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A dog start chasing to a cat 2 hour later. It takes 2 hours to dog to catch the cat. If the speed of the dog is 30 km/h. what is the speed of cat?

A. 10 km/h

B. 12 km/h

C. 15 km/h

D. 20 km/h

Answer: Option C

Solution (By Examveda Team)

Let speed of the cat be S km/h.
Time taken = $$\frac{{{\text{Distanced}}\,{\text{ advanced}}}}{{{\text{Relative}}\,{\text{ speed}}}}$$
2 = $$\frac{{2 \times {\text{S}}}}{{30 - {\text{S}}}}$$
S = 15 km/h

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