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While traveling at uniform speed. U read a two digit no. after one hr the number is reversed order. After another hour the number read is same two digit number. What is the average speed?

Read Solution (Total 2)

Let 10'splace digit is x and unit's place digit y
First milestone : 10x+y
Second milestone : 10y+x
Third milestone : 100x+y
Since the speed is uniform so
Distance covered in first Hr = Distance covered in Second Hr
(10y+x)-(10x+y) = (100x+y)-(10y+x)
After solving, we get ----> y=6x but since x and y are digits so only possible combination is x=1 and y=6,
So average speed = 45 KM/HR
12 years agoHelpfull: Yes(21) No(12)

Answer is 45.
Driver first sees 16 then 61 and then 106.
106-61=45
61-16=45
10 years agoHelpfull: Yes(0) No(2)

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