The distance between towns A and B is less than 100 miles. Pinky starts from A and after 10 hours comes across a milestone indicating the distance from A to that point. She proceeds further and 2 hours later comes to another milestone having the same digits but reverse in order. Q2. What is Pinky’s speed? __________________
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Soln.
Let first milestone has a no. xy so other milestone has yx no.
As Pinky's speed is uniform we can say:
10x+y=5(10y+x-10x-y)
=>10x+y=45y-45x
=>55x=44y
=>5x=4y
So,(x,y)=(4,5)
So distance covered till 2nd milestone is:54miles
So option (b) is correct....
Giv ur best to d world.
Nd d best will cm back to u.....
Regards,
Dipanjan.......
n/a
Soln.:
Pinky covered (54-45)=9miles in 2hrs.
So speed is:4.5miles/hr.
So option (b) is correct....
Giv ur best to d world.
Nd d best will cm back to u.....
Regards,
Dipanjan......
n/a
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