Mahesh purchased $25\, kg$ of rice at $32$ per $kg$ and $15\, kg$ of rice at $Rs\,.36$ per $kg.$ He mixed the two varieties of rice and sold it at $Rs.\, 40.20$ per $kg.$ What is the percent profit earned?

A dealer buys a table listed at $Rs.\,1,500$ and gets successive discounts of $20 \%$ and $10 \% .$ He spends $Rs.\, 20$ on transportation and sells at a profit of $20 \%$ Find the selling price of the table (in $Rs.$)

If a vendor sells a coconut at $Rs.\, 14.4$ he makes $10 \%$ Ioss. If he wants to make $25 \%$ profit, there at what price (in $Rs.$) should he sell?

A dairyman pays $Rs.\, 6.40$ per litre of milk. He adds water and sells the mixture at $Rs.\, 8$ per litre, thereby making $37.5\%$ profit. The proportion of water to milk received by the customers is

A man sold his two cars for $Rs.$ $4.5$ $lakh$ each. In the sale of first car, he incurred $20 \%$ profit and in the sale of the second, he incurred $20 \%$ loss. The total amount of profit or loss is?

A merchant purchases a wrist watch for $Rs.\,450$ and fixes its list price in such a way that after allowing a discount of $10 \%,$ he earns a profit of $20 \%$. Then the list price (in rupees) of the wrist watch is