Step-by-step explanation:
distance walked by him = 1/ 3 miles
time taken in doing so = 3/ 4 hrs.
[tex]speed \: acquired \: by \: him \: = \frac{distance}{time} [/tex]
[tex] = \frac{ \frac{1}{3} }{ \frac{3}{4} } \\ = \frac{ 1}{3} \times \frac{4}{3} \\ = \frac{4}{9} \: miles \: hr^{ - 1} [/tex]
