in the first minute geetha climbs 15 steps of building . after that she climbs 3 steps less than that in the previous minute . then the total number of steps climbed by geetha in 5 minutes is
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steps climb by geetha in 1st min. = 15
2nd min =12
3rd min=9
4th min= 6
5th min = 3
total steps Geetha climb= 15+12+9+6+3= 45 steps
2nd min =12
3rd min=9
4th min= 6
5th min = 3
total steps Geetha climb= 15+12+9+6+3= 45 steps
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