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Byju's Answer
Standard X
Mathematics
Elimination Method of Finding Solution of a Pair of Linear Equations
The ratio of ...
Question
The ratio of two numbers is
5
:
4
and their sum is
54
. The greater of the two numbers is
A
36
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B
24
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C
30
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D
None of these
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Solution
The correct option is
C
30
Let the number be
x
and
y
From the given data,
x
+
y
=
54
x
:
y
=
5
:
4
x
y
=
5
4
4
x
=
5
y
4
x
−
5
y
=
0
x
+
y
=
54
−
−
−
−
−
−
−
×
5
4
x
−
5
y
=
0
5
x
+
5
y
=
270
9
x
=
270
x
=
270
9
x
=
30
30
+
y
=
54
y
=
24
The greatest number is
30
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