Question : Which of the following is not associated with Aryabhata?

Option 1: Stated that day and night were caused by the rotation of the earth on its axis.

Option 2: Developed a scientific explanation for eclipses

Option 3: Found a way of calculating the circumference of a circle

Option 4: Spoke about elaborate surgical procedures

Question : Tides are caused by the gravitational pull of the

Option 1: Earth on the Moon

Option 2: Earth on the Sun

Option 3: Sun and Moon on the Earth

Option 4: Moon on the Earth

Question : The circumference of a triangle is 24 cm and the circumference of its in-circle is 44 cm. Then the area of the triangle is (taking $\pi =\frac{22}{7}$):

Option 1: 56 sq. cm

Option 2: 84 sq. cm

Option 3: 48 sq. cm

Option 4: 68 sq. cm

Question : The moment of inertia of a body does not depend upon its

Option 1: axis of rotation

Option 2: angular velocity

Option 3: form of mass

Option 4: distribution of mass

Question : The circumference of a circle is equal to the perimeter of an equilateral triangle. If the radius of the circle is 7 cm, what is the length of the side of the equilateral triangle?

Option 1: $\frac{22}{3}$ cm

Option 2: $\frac{44}{3}$ cm

Option 3: $44$ cm

Option 4: $22$ cm

Question : Select the INCORRECT statement with respect to the properties of a circle.

Option 1: Two tangents drawn at the end of the diameter of a circle are parallel.

Option 2: The radius drawn perpendicular to a chord bisects the chord.

Option 3: The diameter of a circle is the longest chord of a circle.

Option 4: The perpendicular distance from the centre of a circle increases when the length of a chord increases.