An officer walks to his workplace at 4 km/h and arrives 12 minutes late. If he scales up his speed to 5 km/h, he arrives 6 minutes early. Find the distance to his office. MCQ with Answer and Explanation
An officer walks to his workplace at 4 km/h and arrives 12 minutes late. If he scales up his speed to 5 km/h, he arrives 6 minutes early. Find the distance to his office.
A. 6 km
B. 5 km
C. 8 km
D. 7 km
Answer: Option A
Solution (By JKSSB Mock Tests)
Time difference = 12 - (-6) = 18 minutes = 18/60 = 3/10 hours. Let distance be d. d/4 - d/5 = 3/10 => d/20 = 3/10 => d = 6 km.
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