John walks 5 km per hour. He cycles at 15km per hour. John lives 3 km from the school. How much longer does it take john to walk to school than cycling​

Dear Student,

Please find below the solution to the asked query :

$$\begin{gathered} \mathrm{We} \mathrm{know}, \\ \mathrm{Time}=\frac{\mathrm{Distance}}{\mathrm{Speed}} \\ \mathrm{So}, \\ \mathrm{Time} \mathrm{taken} \mathrm{when} \mathrm{he} \mathrm{walk}=\frac{3}{5} \mathrm{hour} \\ =\frac{3}{5}\times 60 \min =36 \min \\ \mathrm{Time} \mathrm{taken} \mathrm{when} \mathrm{he} \mathrm{cycles}=\frac{3}{15} \mathrm{hour} \\ =\frac{1}{5}\times 60 \min =12 \min \\ \mathrm{He} \mathrm{takes} \left( 36-12\right) \min =24 \min \mathrm{longer} \mathrm{to} \mathrm{walk} \mathrm{than} \mathrm{cycling}. \end{gathered}$$

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