Asked by Ch
In four years time khurail mother will be three time as old as khurail . Six years ago his mother was seven times as old as him
Find khurail present age and
His mother age at time of his birth?
Find khurail present age and
His mother age at time of his birth?
Answers
Answered by
Reiny
Draw a number line, and label points -6, 0 for "now", and 4
put khurail age on top of line and the mothers age at the bottom
in the following way:
4 years from now:
khurail --- x years
mother ---- 3x
now:
khurail ---- x-4
mother ---- 3x-4
6 years ago:
khurail --- x-10
mother --- 3x - 10
but 3x-10 = 7(x-10)
3x-10 = 7x - 70
-4x = -60
x = 15
sub in ....
etc.....
put khurail age on top of line and the mothers age at the bottom
in the following way:
4 years from now:
khurail --- x years
mother ---- 3x
now:
khurail ---- x-4
mother ---- 3x-4
6 years ago:
khurail --- x-10
mother --- 3x - 10
but 3x-10 = 7(x-10)
3x-10 = 7x - 70
-4x = -60
x = 15
sub in ....
etc.....
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