A shopkeeper sells two qualities of sugar at the rates of €55 per kg. and €54 per kg, gaining 10% and 20% profit respectively. If he mixes the two variants in the ratio 3:2 and sells the mixture at €36 per kg., what is his gain or loss?
Two neighbours have adjoining houses as shown below. The houses are fenced, with one side as common. If the cost of fencing is € 15.70 per metre, then what was the total cost of fencing both the houses?
A water tank has two types of taps (type-A and type-B). A tap of type-A can fill the tank in 16 minutes, while a tap of type-B can fill the same tank in 8 minutes. If there are 2 type-A taps and 3 type-B taps that can be used to fill the tank, how long will it take to fill an empty tank?