a) 10 km/h
b) 12 km/h
c) 15 km/h
d) 20 km/h
Answer: c
Explanation: 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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