Elementary Mathematics || Quiz-15|| CDS

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Question 1

A copper wire when bent in the form of a square encloses an area of 121 cm². If the same wire is bent in the form of a circle, it encloses an area equal to

• A121 cm²
• B144 cm²
• C154 cm²
• D168 cm²

Question 2

The area of a regular hexagon of side ‘a’ is equal to

• A square units
• B square units
• C square units
• D square units

Question 3

If then what is the value of tan x?

• A
• B1
• C
• D

Question 4

A 225 m long train is running at a speed of 30 km/hour. How much time does it take to cross a man running at 3 km/hours in the same direction?

• A40 seconds
• B30 seconds
• C25 seconds
• D15 seconds

Question 5

Aman and Alok attempted to solve a quadratic equation. Aman made a mistake in writing down the constant term and ended up in roots (4, 3). Alok made a mistake in writing down the coefficient of X to get roots (3, 2). The correct roots of the equation are

• A-4, -3
• B6, 1
• C4, 3
• D-6, -1

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