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Arvind Kumar Garg

· started a discussion

· 1 Months ago

problem (Question: 252307.0 )

sir
why you divide 320 /2.......

Question:
Two people A and B start moving from P and Q that are 200 Km apart, towards each other. A is on bike and B on foot. They meet at a point R when A gives B a lift to P and returns to his original path to reach Q. On reaching Q he finds that he has taken 2.6 times his normal time. B on the other hand, realizes that he has saved 40 minutes over his normal travel time. Find the ratio of their speeds.
Options:
A) 4 : 3
B) 4 : 1
C) 3 : 1
D) 3 : 2
Solution:

Ans: (b) 

According to the question,

A takes 2.6 times more time than usual

So he has travelled a total distance = 2.6 × 200 = 520 Km

So, A had travelled 320 Km more distance due to P to R and R to P.

Distance P to R = 320/2 = 160 Km

 Q to R = 40 Km

Ratio of speed = 160 : 40 = 4 : 1

Dileep Kumar Raj

· commented

· 1 Months ago

Because A had travelled R to P and then P to R
So extra distance travelled by A is 320
And to find distance between P to R, 320 is devided by 2

Paramount

· commented

· 1 Months ago

Yet to be approved!
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