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