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w=angular valocity
w(a/c)=wa-(-wc )=wa+wc ...........................(as c moves in opposite direction)
2π/(wa+wc )=88
wa+wc =2π/88.............1
similarly,wb+wc =2π/110...............2
subtracting eqn 1 & 2
wa-wb=2π/(1/88-1/110)=π/220
wa/b= π/220
in b frame b stationery.... a move & meet by movin a 360 degrees ;
time= 2π/wa/b =440 seconds
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