If the velocity of a body becomes two times its initial velocity, its kinetic energy becomes n times its initial kinetic energy. What is the value of n?

The given graph shows Distribution of various minerals in the human body.

Calcium
Magnesium
Iron
Potassium
Sodium

Based on the given data, if a person has a total of 1000 IU of all the mentioned minerals in his body, what is the units of calcium distributed in his body?

The length of one side of a rhombus is 41 cm and its area is 720 sq.cm. What is the sum of the lengths of its diagonals?

Five people P, Q, R, S and T visit an office on certain days of a week. They work as a plumber, carpenter, cook, electrician and doctor in random order. A person pursues only one profession and visits the office only one day in the week. Consider the following information and answer questions based on it.

1. The plumber visits office every Monday.
2. P is an electrician who comes neither on Tuesday nor Thursday.
3. T is a carpenter and R is not plumber
4. The person who visits the office on Thursday is not a doctor.
5. S works on a Tuesday and T works on the following day.

Who is the plumber?

Five people P, Q, R, S and T visit an office on certain days of a week. They work as a plumber, carpenter, cook, electrician and doctor in random order. A person pursues only one profession and visits the office only one day in the week. Consider the following information and answer questions based on it.

1. The plumber visits office every Monday.
2. P is an electrician who comes neither on Tuesday nor Thursday.
3. T is a carpenter and R is not plumber
4. The person who visits the office on Thursday is not a doctor.
5. S works on a Tuesday and T works on the following day.

The doctor visits the office on

Five people P, Q, R, S and T visit an office on certain days of a week. They work as a plumber, carpenter, cook, electrician and doctor in random order. A person pursues only one profession and visits the office only one day in the week. Consider the following information and answer questions based on it.

1. The plumber visits office every Monday.
2. P is an electrician who comes neither on Tuesday nor Thursday.
3. T is a carpenter and R is not plumber
4. The person who visits the office on Thursday is not a doctor.
5. S works on a Tuesday and T works on the following day.

Which is the right combination?

The area of a circle is 616 sq.m. Find its diameter.

A call center recruits candidates with the following criteria -

1. Candidates should have passed at least 10th standard.

2. Candidates must be fluent in English and Hindi.

3. Candidates must be ready to work in both day and night shifts.

Which candidate among the following will the call center definitely take?