A. 20 minutes
B. 30 minutes
C. 40 minutes
D. 50 minutes
✅ The correct answer is option C. 40 minutes.
Let his
Let his
usual speed be x kmph
usual travel time be t hours
distance to office be d km d=xt d=(0.8x)*[t+(10/60)] xt=0.8xt+(2x/15) Solving,
t=40 minutes