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08 Aug 2020, 00:09
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
77% (01:56) correct
23%
(02:07)
wrong
based on 147
sessions
History
Date
Time
Result
Not Attempted Yet
Kennet covered half of a certain distance at 30 miles per hour and the other half at 50miles per hour and took 4 hours in all. What is the distance covered by Kennet?
A.140miles
B. 150miles
C. 160miles
D. 170miles
E. 180miles
A.140miles
B. 150miles
C. 160miles
D. 170miles
E. 180miles
yashikaaggarwal
Senior Moderator - Masters Forum
Joined: 19 Jan 2020
Last visit: 29 Mar 2026
Posts: 3,089
Given Kudos: 1,510
Location: India
Schools: Cranfield (A) Warwick MiM "23 (M)
GPA: 4
WE:Analyst (Internet and New Media)
08 Aug 2020, 00:32
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Total time taken = 4 hours.
Total distance=2D
First half (D miles) covered at 30mph
Second half (D miles) covered at 50mph
D/30+D/50 = 4
5D+3D/150 = 4
8D/150 = 4
2D = 150
Answer is B
Posted from my mobile device
Total distance=2D
First half (D miles) covered at 30mph
Second half (D miles) covered at 50mph
D/30+D/50 = 4
5D+3D/150 = 4
8D/150 = 4
2D = 150
Answer is B
Posted from my mobile device
08 Aug 2020, 00:35
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Bookmarks
Avg. speed = 2ab/(a+b)
Also, Avg speed =
total distance/total time.
let total distance be 2x .
2x/4 = (2×30×50)/(50+30).
2x= 150
Posted from my mobile device
Also, Avg speed =
total distance/total time.
let total distance be 2x .
2x/4 = (2×30×50)/(50+30).
2x= 150
Posted from my mobile device
