Due to a $20 \%$ rise in price of sugar, a bachelor is able to buy $1.5\, kg$ less for $Rs.\, 135.$ What is the increased price of sugar per $kg$ in $Rs.$ ?

An article is sold for $Rs.\,4950$ at a gain of $10 \% .$ What would have been the gain or loss per cent if it had been sold for $Rs$ $4275 ?$

A shopkeeper sells notebooks at the rate of $Rs.\, 45$ each and earns a commission of $4 \% .$ He also sells pencil box at the rate of $Rs.\, 80$ each and earns a commission of $20 \% .$ How much amount of commission will he earn in two weeks if he sells $10$ notebooks and $6$ pencil boxes a day? (in $Rs.$)

Mr Verma sold his scooter for $Rs.\,10500$ at a gain of $5 \%$. Find out the cost price of the scooter. (in $Rs.$)

An article is listed at $Rs.\,65.$ A customer bought this article for $Rs.\, 56.16$ and received two successive discounts of which one is $10 \% .$ Find out the other discount in this discount scheme offered by the shopkeeper. (in $Rs.$)

A shopkeeper sells rice at $10 \%$ profit and uses weight $30 \%$ less than the actual measure. His gain percent is