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Byju's Answer
Standard VII
Physics
Speed (Average Speed)
For a × bm × ...
Question
For
(
a
×
b
m
)
×
(
c
×
b
n
)
=
(
a
c
×
b
m
+
n
)
,
if
(
a
c
×
b
m
+
n
)
is in scientific notation, then:
A
1
≤
a
c
<
10
,
b
=
10
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B
1
≤
a
c
≤
10
,
b
=
1
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C
1
≤
a
c
≤
10
,
b
=
10
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D
0
≤
a
c
≤
10
,
b
=
10
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Solution
The correct option is
A
1
≤
a
c
<
10
,
b
=
10
Detailed step-by-step solution:
(
a
×
b
m
)
×
(
c
×
b
n
)
=
(
a
c
×
b
m
+
n
)
P
×
10
Q
is said to be in scientific notation if
1
≤
P
<
10
, and the exponent
Q
is a positive or negative integer.
Given
(
a
c
×
b
m
+
n
)
is in scientific notation.
⇒
1
≤
a
c
<
10
,
b
=
10
➡Option C is correct.
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In the adjoining figure, BM
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