Another PJ

A person travelling in a deluxe car and he got struck in a desert..........he wants to take a bath with soap and water.......there is no water anywhere in the vicinity..........guess how he manages to take the bath in the desert

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So here is the answer :

As he is having a 'd lux' car..........he will integrate it and hence the d(derivator) symbol will cancel out and he will get

lux + c(constant of integration)...........so he will get c(sea) and lux(soap)..........and he will enjoy taking a bath......

how was that???????????????