a)
[tex]180 \frac{km}{h} = \frac{180km}{h} = \frac{180000m}{3600s} = \frac{1800m}{36s} = \frac{100m}{2s} = 50 \frac{m}{s}
[/tex]
b)
[tex]45 \frac{km}{h} = \frac{45km}{h} = \frac{45000m}{3600s} = \frac{450m}{36s} = 12.5 \frac{m}{s} [/tex]
c)
[tex]20 \frac{m}{s} = \frac{20m}{s} = \frac{ \frac{20}{1000} km}{ \frac{1}{3600} h} = \frac{20}{1000} km \div \frac{1}{3600} h = \frac{20}{1000} km \times \frac{3600}{1} h = 2 \times 36 \frac{km}{h} = 72\frac{km}{h}[/tex]
d)
[tex]30 \frac{m}{s} = \frac{30m}{s} = \frac{ \frac{30}{1000} km}{ \frac{1}{3600} h} = \frac{30}{1000} km \div \frac{1}{3600} h = \frac{30}{1000} km \times \frac{3600}{1} h = 3 \times 36 \frac{km}{h} = 108\frac{km}{h}[/tex]
e)
[tex]40 \frac{m}{s} = \frac{40m}{s} = \frac{ \frac{40}{1000} km}{ \frac{1}{3600} h} = \frac{40}{1000} km \div \frac{1}{3600} h = \frac{40}{1000} km \times \frac{3600}{1} h = 4 \times 36 \frac{km}{h} = 144\frac{km}{h}[/tex]
f)
[tex]22.5\frac{km}{h} = \frac{22.5km}{h} = \frac{22500m}{3600s} = \frac{225m}{36s} = 6.25 \frac{m}{s}[/tex]
