Each of the questions given below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question.

What is the speed of a boat in still water?

I. The boat covers $12 \mathrm{km}$ in $2$ hours downstream.

II. The boat covers the same distance in $4$ hours upstream.

III. The speed of the stream is one-third that of the boat in still water.

In each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer.

What is the speed of the train in kmph?

Statement:
I. The train crosses an 'x' metre long platform in 'n' seconds,
II. Length of the train is 'y' metres.
III. The train crosses a signal pole in 'm' seconds.

Each of the questions given below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question.

What is the cost of milk in the completely filled up cylindrical tank?

I. Area of the base of the tank is $2464{ \mathrm{cm}}^2$.

II. Area of the square with side equal to one-third of the tank's height is $841{ \mathrm{cm}}^2$.

III. Cost of milk is ₹ $1.5/{\mathrm{cm}}^3$

The question given below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question.

What is the present age of Subir?

I. The present age of Subir is half that of his father.

II. After $5$ yrs the ratio of Subir's age to his father's will be $6: 11$.

III. Subir is $5$ yrs younger than his brother.

The question given below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question.

What is Uma's present age?

I. Uma's age is one-fourth of her mother's age at present.

II. Four years hence her age will be one-third of her mother's age.

III. Uma is younger than her brother by $4$ years, whose age is less than their mother by $20$years.

Each of the questions given below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question.

What is the age of a class teacher?

I. There are $11$students in the class.

II. The average age of the students and the teacher is $14$years.

III. The average age of the teacher and the students is $3$ years more than that of the students.

In each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer.

What is the present age of Radhika?

I. Radhika's present age is $\frac{2}{11}$th of her mother's age at present.

II. Radhika is older than her brother by four years.

III. After four years Radhika's age will be one-fourth of her mother's age at that time.