Question 112

There are three types of old coins in a box at 3: 5: 7. The value of old currencies is 1 rupee, 5 rupees and 10 rupees respectively. The total value of the coins in the box is Rs. If 2450, find the number of coins worth 10 rupees.

Solution

Let number of 1 rupee, 5 rupees and 10 rupees respectively be $$3x,5x$$ and $$7x$$

Total amount = $$(1\times3x)+(5\times5x)+(10\times7x)=2450$$

=> $$3x+25x+70x=2450$$

=> $$x=\frac{2450}{98}=25$$

$$\therefore$$ Number of 10 rupees coins = $$7\times25=175$$

=> Ans - (B)

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