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Byju's Answer
Standard VIII
Mathematics
Point, Line, Plane/Surface, Solid
A surface is ...
Question
A surface is a
entity.
A
1-D
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B
2-D
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C
3-D
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D
4-D
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Solution
The correct option is
B
2-D
A surface is a 2-D entity with length and breadth as its dimensions. It has an area but no thickness.
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Similar questions
Q.
If
1
,
d
1
,
d
2
,
d
3
,
d
4
are roots of
x
5
=
1
then the value of expression :
E
=
ω
−
d
1
ω
2
−
d
1
⋅
ω
−
d
2
ω
2
−
d
2
⋅
ω
−
d
3
ω
2
−
d
3
⋅
ω
−
d
4
ω
2
−
d
4
is
[Here
ω
is the cube root of unity]
Q.
Four fair dice
D
1
,
D
2
,
D
3
and
D
4
, each having six faces numbered
1
,
2
,
3
,
4
,
5
and
6
,
are rolled simultaneously. The probability that
D
4
shows a number appearing on one of
D
1
,
D
2
and
D
3
is
Q.
If
D
p
=
∣
∣ ∣ ∣
∣
p
15
8
p
2
35
9
p
3
25
10
∣
∣ ∣ ∣
∣
, then
D
1
+
D
2
+
D
3
+
D
4
+
D
5
is equal to
Q.
if
D
p
=
∣
∣ ∣ ∣
∣
p
15
8
p
2
55
9
p
3
225
10
∣
∣ ∣ ∣
∣
, then
D
1
+
D
2
+
D
3
+
D
4
+
D
5
is equal to
Q.
If
D
P
=
∣
∣ ∣ ∣
∣
P
15
8
P
2
35
9
P
3
25
10
∣
∣ ∣ ∣
∣
,
then
D
1
+
D
2
+
D
3
+
D
4
+
D
5
is equal to -
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