The total area of a circle and a square is 5450 cm². The diameter of the circle is 70 cm. What is the difference between the circumference of the circle and the perimeter of the square?

If a certain number of two digits is divided by the sum of its digits, the quotient is 6 and the remainder is 3. If the digits are reversed and the resulting number is divided by the sum of the digits, the quotient is 4 and the remainder is 9. The sum of the digits of the number is 

By selling 33 metres of cloth a person gain the cost price of 11 metres. find the gain%

If p : q : r = 1: 2: 4, then $$\sqrt{5p^{2}+q^{2}+r^{2}}$$ is equal to 

The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg.) 

Direction : What should come in place of the question (?) in the following question.

$$ {\sqrt{441}}+ {(71)^{2}} -{(?)^{2}}=2707 $$

Direction: Study the following information to answer the questions.

What is the average number of male customers in hotel B on Monday, Wednesday and Thursday?

A is 80% more than B and C is $$48{4\over 7}\%$$ less than the sum of A and B. By what percent is C less than A?