Mr. Karthik drives to work at an average speed of 48 km/hr. Time taken to cover the first 60% of the distance is 20 minutes more than the time taken to cover the remaining distance. Then how far is his office ? Choose the correct answer:
A) 23 B) 98 C) 28 D) 80 E) 19
Explanation:   Let the total distance be 'x' km.   Time taken to cover remaining 40% of x distance is   But given time taken to cover first 60% of x distance is   \Rightarrow   \small \Rightarrow x=80 km.   Answer: 80
<result>D</result>
Mr. Karthik drives to work at an average speed of 48 km/hr. Time taken to cover the first 60% of the distance is 20 minutes more than the time taken to cover the remaining distance. Then how far is his office ?