Problem 11
Fam and Sunil orcer coffee and receive cups simultaneously at equal temiperature. Ram adds a spoon of cold cream but doeen't drink for 10 minutes, Sunil waite for 10 minutes and udds a spoon of cold creum and begins to drink. Who drinks the hetter coffee?
Problem 12
The equntion \(y-2 x=x\) represente the orthogonal trujectories of the family (i) \(y=a e^{-2 u}\) (ii) \(x^{2}+2 y^{2}=a\) (iit) \(x y=a\) \((i v) x+2 y=a\)
