Answers

2014-05-14T10:28:33+05:30
Distance covered by car = 200km in 160 min
distance covered by jeep=200km in 120min
speed=distance/time

so 200/160 : 200/120 =5/4:5/3
or 
200/9600s:200/7200
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Simplify to smallest form
hey well said and well done
I think it comes under physics.
2014-05-14T10:50:09+05:30
Speed of car = 200/160
Speed of jeep = 200/120
Their ratio = 200/160 : 200/120
This can be written as 200/160 * 120/200
= 120/160
=3:4
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