Anuva takes 20 minutes less to reach her office if her speed increase by 5 km/h and takes 30 minutes more if her speed decreases by 5 km/h.
What is her original speed ?
(1) 20 km/h
(2) 30 km/h
(3) 35 km/h
(4) None of these
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Answer:
(4) none of the these
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