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Ramandeep singh

· started a discussion

· 1 Months ago

How y-x=3 comes (Question: 249235.0 )

You have promised for an error free test paper and detailed solutions but your vagueness is just continuing

Question:
Kapil and Sonia started from A and B for B and A, which are 795 Km apart. They meet after 15 hours. After meeting, Kapil reduced his speed by 3 Km/h and Sonia increased by 3 Km/h, they arrived at same time. What was the speed of Sonia?
Options:
A) 25 Km/h 
B) 28 Km/h
C) 23 Km/h
D) 27 Km/h 
Solution:

Ans: (a) 


Shashank Shah

· commented

· 1 Months ago

Brother this bit logical..actually with keen observation you will see that for reaching their destination ON EXACT TIME, they are just travelling the distance which has been previously covered by other one i.e., if kapil coverd x kms earlier ,then sonia 'll cover this 'x' kms after meeting. As we know know ,that for same time frame, distance and speeds are propotional.therefore it is clear that they are just exchanging their speeds( as they are exchanging their distances). It implies that : y should be greater than x ; y-x=3..hope you got it
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