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Mathematics
Mathematics
Problem
A garden sprinkler wets a sector of a circle of radius
4
m
4\,\text{m}
4
m
making an angle of
90
∘
90^{\circ}
9
0
∘
at the centre. Taking
π
=
3.14
\pi = 3.14
π
=
3.14
, calculate the area of the ground watered in one full rotation of the sprinkler head. a)
25.12
m
2
25.12\,\text{m}^2
25.12
m
2
b)
48
m
2
48\,\text{m}^2
48
m
2
c)
50.24
m
2
50.24\,\text{m}^2
50.24
m
2
d)
12.56
m
2
12.56\,\text{m}^2
12.56
m
2
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