Two men Kuldeep and Agarkar working separately can mow a field in 8 and 12 hours respectively. If they both are working alternately for an hour, and Kuldeep starts the work at 9 a.m., when will the mowing be finished?
1
7.30 p.m.
2
5.30 p.m.
3
6.30 p.m.
4
4.30 p.m.