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please help me with these questions in mathematics................................

1.Mr.Harikishan is out of station for seven days.He returns home on monday morning.He observes a snail making its way up the wall of your cabin.Each day,it carefully works its way 2.5m up the wall.At night,though,it slips back down 1 metre.The cabin wall is 9 m high.If the snail started on monday,when will it reach the top of the cabin wall ? a)Friday morning 2)saturday evening 3)Thursday morning 4)monday morning

2.A log of wood has 33 kg weight.A group of termites started eating it.Everyday , these termites eat 10000 mg of wood.In how many days will the group of termites eat the whole log of wood? a) 3300 days b)33 days c)303 days d)330 days

Ans2) 1 kg =1000000 mg so 33 kg=33000000mg total days=wt.of wood/wt.of daily loss days=33000000/10000 ans....3300 option A ans1)total distance in one night and day=2.5-1=1.5m total days required=total distance/distance in one night and day =9/1.5 =6days.... so....answer is saturday eve