60 reems initially.. 40 reems used..
so 20reems left...
radius of reem-roll is directly proportional to number of
reems on it..

and amount of paper is proportional to the area of circle..
so
answer is 2^2/6^6 = 1/9
think guys think !!
amount of paper on 1st reem will be way less than that of
60th !!
radius of reem-roll increases with each reem

If a passenger train takes twice to cross a freight train
to overtake than to cross each other in opposite direction
find how many times faster is passenger train than the
freight train

One train leaves Los Angeles at 15mph heading for New York.
Another train leaves from New York at 20mph heading for Los
Angeles on the same track. If a bird, flying at 25mph,
leaves from Los Angeles at the same time as the train and
flies back and forth between the two trains until they
collide, how far will the bird have traveled?

2 hours after a freight train leaves Delhi a passenger
train leaves the same station travelling in the same
direction at an average speed of 16 km/hr. After travelling
4 hrs the passenger train overtakes the freight train. The
average speed of the freight train was?