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

This question belongs to Arithmetic Ability Speed Time And Distance
Speed Time and Distance
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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?

Answer & Solution
Correct Answer: Option C
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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