Question

A man walks at a speed of $4$ km/hr and runs at a speed of $8$ km/hr. How much time will the man require to cover a distance of $24$ km if he completes half of his journey walking and half running?

• A. $5$ hrs
• B. $2.2$ hrs
  
• C. $9$ hrs
  
• D. $4.5$ hrs
  

Answer 1

The correct option is D $4.5$ hrs

Required time $=\frac{12}{4}$ hrs. $+\frac{12}{8}$ hrs.$=3$ hrs. $+1.5$ hrs. $=4.5$ hrs.