a)this is an arithmetic series
equation: 10+(n-1)d=360
note: 6hrs=60x6=360minuites
(b) 10+(n-1)d=360
n= no of days
d=common difference=2minutes
10+(n-1)2=360
(n-1)2=360-10
n-1=350/2
n-1=175
n=175+1
n=176
