Answer: C. 5 h
Step-by-step explanation:
Given: 1 min = 60 s
\(\\\Rightarrow1s=\frac{1}{60}\ \text{min}\)
1 h = 60 min
\(\\\Rightarrow1\ \text{min}=\frac{1}{60}\ h\\\Rightarrow\ 1s=\frac{1}{60}\times\frac{1}{60}\ h\\\Rightarrow\ 1s=\frac{1}{3600}h\)
Then, 18000s=\(18000\times\frac{1}{3600}h\)
\(\\\Rightarrow\ 1800s=5h\)
Hence C is the right option. 18,000 s is equivalent to 5 h
