Read the following statements about great circles and select the option that is true.

Assertion [A]: Great circles are highly useful for navigation.

Reason [R]: They represent the longest distance between two points on a sphere.

Both A and R are true. R provides the correct explanation for A.

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Both A and R are true. R provides the incorrect explanation for A.

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A is true but R is false.

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Both A and R are false.

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Solution

The correct option is C A is true but R is false.
A great circle is the largest circle that divides a sphere into two halves. The equator is the only great circle of the Earth. It shows the shortest path between two points on the Earth. Thus, sailors and pilots use great circles to adjust their routes while travelling over long distances.

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Similar questions

Which of the following statements is not true ?

(a) A line which intersects a circle in two points, is called a secant of the circle.

(b) A line intersecting a circle at one point only, is called a tangent to the circle.

(d) A tangent to the circle can be drawn from a point inside the circle.

Assertion-and-Reason Type

Each quation consists of two statements, namely Asserction (A) and Reason (R). For selecting the correct answer, use the following code;

(a) Both Assertion (A) and Reasson (R) are true and Reason (R)

is a correct explanation of Assertion (A).

(b) Bothe Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).

(d) Assertion (A) is false and Reason (R) is true.

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