A bag contains 25 paise and 50 paise coins whose total value is Rs.30. If the number of 25paise coins is four times that of 50paise coins, find the number of each type of coins.
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Q4
The outer circumference of a circular race-track is 528m . The track is everywhere 14m wide. Calculate the cost of levelling the track at the rate of 50 paise per square metre . Use π=227
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Q5
A shopkeeper earns a profit of Rs2 by selling a pen and incurs a loss of 50paise per pencil and loss of 15paise per eraser while selling old stock. On a particular day, he earns a profit of Rs10. If he sold 10 pens and number of pencils and erasers he sold are in the ratio 7:10, then find the number of pencils and eraser he sold that day.