A private van covers 1/3 of a route corridor path at 10 km/h, 1/3 at 20 km/h and the final 1/3 segment sector at 60 km/h. Find the mean average speed. MCQ with Answer and Explanation
A private van covers 1/3 of a route corridor path at 10 km/h, 1/3 at 20 km/h and the final 1/3 segment sector at 60 km/h. Find the mean average speed.
A. 20 km/h
B. 18 km/h
C. 22 km/h
D. 16 km/h
Answer: Option B
Solution (By JKSSB Mock Tests)
Let each third segment distance be 60 km. Total distance = 180 km. Total time taken = 60/10 + 60/20 + 60/60 = 6 + 3 + 1 = 10 hours. Average speed across route = 180 / 10 = 18 km/h.
A person walks from his home to his shop at a speed of 5 km/h and arrives 6 minutes early. If he walks at 4 km/h, he arrives 6 minutes late. Find the distance between his home and shop.
A motorboat registers a speed of 14 km/h in still water. If the river current tracks at 2 km/h, find the duration required to complete a 48 km downstream course.
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