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poonam1279
- Master | Next Rank: 500 Posts
- Posts: 145
- Joined: Thu Nov 13, 2008 7:18 am
- Location: United Kingdom
- Thanked: 5 times
TIP: focus on the question and what it asked!
answer:
k/a=5/3 and
(k-10)/(a+10)=7/5
=>
k=150 and a=90
note: k-10=140 and a+10=100 => answer is 40.
