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Byju's Answer
Standard XII
Chemistry
Examples of Ionic Compounds
In the rectan...
Question
In the rectangular solid in Figure 1, calculate the distance from vertex
A
to vertex
B
.
A
√
65
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B
7
√
2
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C
9
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D
11
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Solution
The correct option is
C
9
The length of the diagonal of the bottom face be
B
C
.
∴
B
C
=
√
4
2
+
7
2
In
△
A
B
C
,
A
B
2
=
A
C
2
+
B
C
2
A
B
2
=
4
2
+
(
4
2
+
7
2
)
A
B
=
√
16
+
16
+
49
=
√
81
∴
A
B
=
9
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