A man goes to his office from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming, what is the distance between his house and office? Pick.
A) 8 B) 7 C) 4 D) 6 E) 09
If a car covers a certain distance at x kmph and an equal distance at y kmph,the average speed of the whole journey = 2xyx+y kmphHence, average speed = 2×3×22+3=125 km/hrTotal time taken = 5 hours⇒6istance travelled=125×5=12 km⇒6istance between his house and office =122=6 km   Answer : 6
<result>D</result>
A man goes to his office from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming, what is the distance between his house and office?