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Question: A car is traveling at a uniform speed. The driver sees a milestone showing a 2-digit number. After traveling for an hour the
driver sees another milestone with the same digits in reverse order. After another hour the driver sees another milestone containing
the same two digits with a zero in between(0). What is the average speed of the driver.
PLEASE EXPLAIN STEP WISE
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| June 06, 2008 12:58:18 |
#2 |
| varun.pulyani |
Member Since: June 2008 Total Comments: 2 |
RE: A car is traveling at a uniform speed. The driver sees a milestone showing a 2-digit number. After traveling for an hour thedriver sees another milestone with the same digits in reverse order. After another hour the driver sees another milestone conta
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Without using equations :-
1st distance = xy
2nd distance = yx
3rd = x0y or y0x
since first 2 valuess r two digits....avg speed can't be greater than 100.
Thus difference between 2nd and 3rd value is also less than 100.
Thus third distance is in 100's
thus x=1
now checking for possibility of y, y=6
Average speed = 45 |
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