One day, Mr. Wahid started 30 minutes late from home and reached his office 50 minutes late, while driving 25% slower than his usual speed. How much time in minutes does Mr. Wahid usually take to reach his office from home?
সমাধান
সঠিক উত্তর: Option A
Let the distance is d and usual speed is v Time=distance/speed=d/s Hence d/0.75v-d/v=20
