1. A Box contains three different types of old coins in the ratio 3:5:7, the values of old coins are 1 rupee, 5 rupees and 10 rupees respectively. If the total value of the coins in the box is Rs.294, find the number of coins values 10 rupees.





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  • By: anil on 05 May 2019 01.13 am
    Let number of 1 rupee, 5 rupees and 10 rupees respectively be $$3x,5x$$ and $$7x$$ Total amount = $$(1 imes3x)+(5 imes5x)+(10 imes7x)=2352$$ => $$3x+25x+70x=294$$ => $$x=frac{294}{98}=3$$ $$ herefore$$ Number of 10 rupees coins = $$7 imes3=21$$ => Ans - (D)
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