The ratio in which rice at Rs.
a kg be mixed with rice at Rs.
a kg to produce a mixture worth Rs.
a kg be expressed as
. Find
.
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7 . 2 x + 5 . 7 ( 1 − x ) = 6 . 3
x = 0 . 4
b a = 1 − 0 . 4 0 . 4 = 3 2
( a + b ) 2 = ( 2 + 3 ) = 2 5