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.Management Sciences
A. 20 minutes
B. 30 minutes
C. 40 minutes
D. 50 minutes
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
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