in crossing a distance of 30km . a takes 2 hrs more than b. if a doubles his speed ,he would have taken ihr less than b. then their speeds are?
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both are 30 km / hr . speed = distance / time
that is speed = 30/2 = 15 . so 15km/ hr took him 2 hrs. he double his speed . so now it will be 30 km. which takes him 1 hr. and b is also same!
that is speed = 30/2 = 15 . so 15km/ hr took him 2 hrs. he double his speed . so now it will be 30 km. which takes him 1 hr. and b is also same!
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Answer:
Step-by-step explanation:
Let the speed of A be x and that of B be y
Therefore 30/x - 30/y = 2
30/2x -30/y = -1
On solving we get
x = 5km/hr and y = 7.5km/hr
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