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Standard IX
Mathematics
Question
The angle which is
1
5
t
h
of its supplement is
15
o
30
o
45
o
60
o
A
60
o
B
30
o
C
15
o
D
45
o
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Solution
Verified by Toppr
Let the angles be
x
and its supplement be
y
=
180
−
x
Given :
x
=
1
5
y
⟹
x
=
1
5
×
(
180
−
x
)
⟹
5
x
=
180
−
x
⟹
6
x
=
180
∴
x
=
180
6
∴
x
=
30
o
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