Question Number 114 by saidinesh999.sd@gmail.com last updated on 25/Jan/15
$${a}\:{bus}\:{travels}\:{at}\:{a}\:{speed}\:{of}\:\mathrm{72}\:{km}\:{per}\:{hour}.{what}\:{is}\:{its}\:{speed}\:{in}\:{metres}\:{per}\:{second}? \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$
Answered by ghosea last updated on 04/Dec/14
$$\mathrm{Speed}=\mathrm{72}\:\mathrm{km}/\mathrm{h}=\mathrm{72}×\mathrm{1000meters}/\mathrm{hour} \\ $$$$=\mathrm{72000}\:\mathrm{meters}/\mathrm{hour}=\frac{\mathrm{72000}}{\mathrm{3600}}\mathrm{meters}/\mathrm{second} \\ $$$$=\mathrm{20}\:\mathrm{meters}\:\mathrm{per}\:\mathrm{second} \\ $$