The diameter of a circle is 41 ft. Find its area to the nearest whole number.
2 answers:
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Let, No of shoppers on first day = a
No of shoppers on second day = b
Similarly till seventh day,
Therfore shoppers on seventh day=
a + b + c + d + e + f + g
As mentioned ,number of shoppers is 10% more than the number of shoppers the day before. i.e we can understand that a to g all are 1.1 times bigger than the previous letter.
That means all are in geometric series.
We know the formula for sum of geometric series is,
=
That is,
a = 120
r = 1.1
n = 7
=
=
= 212.58
Approximately