The age of a and b are in the ratio of 7:5. Ten years the ratio of their age will be 9:7.find their present age?
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the present age of a and b is 35 and 25
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Let the Age of A be 7x and B be 5x
Then, after 10 years
(7x + 10) / (5x / 10) = 9/7
=> 7 (7x + 10) = 9 (5x + 10)
=> 49x + 70 = 45 x + 90
=> 4x = 20
=> x = 20
SUBSTITUTING VALUE OF x to find out ages,
A's age = 7×5 = 35 Years
B's age = 5×5 = 25 YEARS
>>>>>>>>>>>>>>>>>>>>>>
Then, after 10 years
(7x + 10) / (5x / 10) = 9/7
=> 7 (7x + 10) = 9 (5x + 10)
=> 49x + 70 = 45 x + 90
=> 4x = 20
=> x = 20
SUBSTITUTING VALUE OF x to find out ages,
A's age = 7×5 = 35 Years
B's age = 5×5 = 25 YEARS
>>>>>>>>>>>>>>>>>>>>>>
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