Question

present age of vani is 4 times the present age of her sister mala.After 10 years,twice vani's age will be 4 times mala's age .Find their present ag

Answer 1

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Answer 2

$LET MALA'S PRESENT AGE BE = x$

$SO VANI'S PRSENT AGE WILL BE = 4x <i>( according to the question) </i>$

$MALA'S AGE AFTER 10 YEARS = x + 10$

$VANI' AGE AFTER 10 YEARS = 4x + 10$

$2(4x + 10) = 4(x + 10). <i> (According to the question) </i>$

$8x + 20 = 4x + 40$

$8x - 4x = 40 - 20$

$4x = 20$

$x =\dfrac {20}{4}$

$x = 5$

SO MALA'S PRESENT AGE IS = 5
HENCE,VANI'S PRESENT AGE IS = 5×4 ➡20

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