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1. |
N, at a speed of 20 km/h reaches his office 10 min late. Next time he increases his speed by 5 km/h, but is still late by 4 min. What is the distance of office from his house? |
A. | 6 km |
B. | 20 km |
C. | None of these |
D. | 12 km |
Answer» D. 12 km | |