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Byju's Answer
Standard VI
Mathematics
Expressing Relations in Multiplication and Addition
36 years from...
Question
36 years from now the age of a man will be square of what he was 36 years ago. find his present age
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Solution
Let
the
present
age
of
man
=
x
yrs
Age
of
man
36
years
ago
=
x
-
36
yrs
Age
of
man
after
36
years
=
x
+
36
yrs
Now
,
according
to
question
:
x
+
36
=
x
-
36
2
⇒
x
+
36
=
x
2
+
1296
-
72
x
⇒
x
2
-
73
x
+
1260
=
0
⇒
x
2
-
45
x
-
28
x
+
1260
=
0
⇒
x
x
-
45
-
28
x
-
45
=
0
⇒
x
-
45
x
-
28
=
0
⇒
x
-
45
=
0
or
x
-
28
=
0
⇒
x
=
45
or
x
=
28
rejected
So
,
present
age
of
man
=
45
yrs
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