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If three cats catch three mice in three minutes, how many cats would be needed to catch 100 mice in 100 minutes?
Answer: The same three cats would do. Since these three cats are averaging one mouse per minute, given 100 minutes, the cats could catch 100 mice.
Solution:
How long the scooter Tyre run?
Answer: 7.5 KM
Solution:
First run 2.5 km and change the 1st tyre with stepney. Now kms remains in 1st Tyre: 2.5 km, 2nd tyre: 2.5 km, Stepney : 5 km
Again run for 2.5 km and this time change 2nd tyre with 1st tyre: Now kms remains 1st tyre: 2.5 km, 2nd tyre :0 km ,stepney : 2.5 km.
Now run 2.5 km with remaining 1st tyre and stepney .
Total: 2.5+2.5+2.5=7.5
First run 2.5 km and change the 1st tyre with stepney. Now kms remains in 1st Tyre: 2.5 km, 2nd tyre: 2.5 km, Stepney : 5 km
Again run for 2.5 km and this time change 2nd tyre with 1st tyre: Now kms remains 1st tyre: 2.5 km, 2nd tyre :0 km ,stepney : 2.5 km.
Now run 2.5 km with remaining 1st tyre and stepney .
Total: 2.5+2.5+2.5=7.5