Question

on 21 March and 23 September the days and nights are​

Answer 1

Solution

Rational Number : A rational number is a fractional number which is in the form of a p/q , where q is ≠ 0.

Some examples are 2/5,3/6,7/8 , 2/3, 2/9 and so on.

Here , see the denominator 5,6,8,9 &3 all are >0

=>Rational number can be further converted into decimal form e.g., 1/2= 0.5

Learn more:

Types

Real Numbers ( real numbers includes all the integers )

Natural Numbers

Whole Numbers

Standard form of Rational Number:

Rational number having fractional values with no common factor between dividend and divisor and Divisor be positive.

e.g., 12/36= 2/6= 1/3

Answer 2

Answer:

On 21st March and September23rd, direct rays of the sun fall on the equator. At this position, neither of the poles is tilted towards the sun; so, the whole earth experiences equal days and equalnights. This is called an equinox.