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majorsheetal
- Junior | Next Rank: 30 Posts
- Posts: 17
- Joined: Tue Sep 01, 2009 8:45 am
- Location: Ahmedabad
Joe Drives at 40 miles/hour to reach his office which is 240 miles away. If he increases his speed by 50 % , the travel time will decrease by :
This i very easy problem but i wanted to know the quick procedure to solve it.
This is the way how i solved it ..
s1 = 40 m/h t1
s2 = 60 m/h t2
s1t1 = s2t2
40 t1 = 60 t2
t2 = 40/60 t1
= 2/3 t1
= .33 t1
hence the time will decrease by 33%.
i even do not know the answer is it correct?
This i very easy problem but i wanted to know the quick procedure to solve it.
This is the way how i solved it ..
s1 = 40 m/h t1
s2 = 60 m/h t2
s1t1 = s2t2
40 t1 = 60 t2
t2 = 40/60 t1
= 2/3 t1
= .33 t1
hence the time will decrease by 33%.
i even do not know the answer is it correct?
