Aravind had a kiddy bank. it os full of one- rupee and fifty paise coins . it contains 3 times as many fifty paise coins as one rupee coins . the total amount of the money in the bank is rs.35. how many coins of each kind are there in the bank
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let number of 50 paise coins be x & of 1 rupee coin be y
as we know y=2x
y-2x=0 ---------1
y+3x=35 ---------2
subtract equation 1 from 2
y+3x=35
-(y-2x)=(0)
=0+5x=35
x=7
substitute value of x in equation 1
y-2x=0
y-2(7)=0
y=14
therefore there are 14 one rupee coins and 7 fifty paise coins
as we know y=2x
y-2x=0 ---------1
y+3x=35 ---------2
subtract equation 1 from 2
y+3x=35
-(y-2x)=(0)
=0+5x=35
x=7
substitute value of x in equation 1
y-2x=0
y-2(7)=0
y=14
therefore there are 14 one rupee coins and 7 fifty paise coins
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