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Byju's Answer
Standard IX
Mathematics
Cuboid
Question 9The...
Question
Question 9
The length of the longest pole that can be put in a room of dimensions
(
10
m
×
10
m
×
5
m
)
is:
A)
15 m
B)
16 m
C)
10 m
D)
12 m
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Solution
The answer is A.
Given, dimensions of a room;
l = 10m, b = 10m, h = 5m
∴
Length of the longest pole = Diagonal of the cuboid (room)
=
√
l
2
+
b
2
+
h
2
=
√
(
10
)
2
+
(
10
)
2
+
(
5
)
2
=
√
100
+
100
+
25
=
√
225
=
15
m
Hence, the length of the longest pole is 15 m.
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Question 9
The length of the longest pole that can be put in a room of dimensions
(
10
m
×
10
m
×
5
m
)
is:
A)
15 m
B)
16 m
C)
10 m
D)
12 m
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