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Topic
Quantitative Aptitude
Mensuration
Question
The angle at which the circles
(
x
−
1
)
2
+
y
2
=
Â
10
Â
a
n
d
Â
x
2
+
(
y
−
2
)
2
=
5
intersect is
Options:
A
.
 Ï€6
B
.
 Ï€4
C
.
 Ï€3
D
.
 Ï€2
Answer: Option B
:
B
r
1
=
√
10
r
2
=
√
5
d
=
√
(
1
)
2
+
(
2
)
2
=
√
5
c
o
s
θ
=
r
2
1
+
r
2
2
−
d
2
2
r
1
r
2
=
10
+
5
−
5
2
√
10
√
5
=
10
2
×
5
×
√
2
=
1
√
2
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