Sagot :
given ..\\ d = 60 \\ t = 4 \\ t = 10 \\ \frac{60}{ \frac{4}{10} } = \frac{d( \frac{4}{10} )}{ \frac{4}{10} } \\ \\ \frac{10}{ \frac{2}{5} } = \frac{d( \frac{2}{5}) }{ \frac{2}{5} } \\ \\ 10 = d \\ 10 = d
given ..\\ d = 60 \\ t = 4 \\ t = 10 \\ \frac{60}{ \frac{4}{10} } = \frac{d( \frac{4}{10} )}{ \frac{4}{10} } \\ \\ \frac{10}{ \frac{2}{5} } = \frac{d( \frac{2}{5}) }{ \frac{2}{5} } \\ \\ 10 = d \\ 10 = d