The logic behind the series is:
13 + 6 = 19

19 – 12 = 7

7 + 18 = 25

25 – 24 = 1
A consecutive multiple of 6 is getting added and subtracted alternately.

Hence, the correct answer is 25.

The pattern is:

Hence, option D is the correct answer.

∵ 4secθ = 5

∴ cosθ = 4/5; tanθ = 3/4; sinθ = 3/5; cotθ = 4/3

Putting above values in the question

=

= (9 – 6)/(12 − 16)

= − 3/4

= − tanθ

Let the total distance be x km

He travels x/3 of his journey at 24 kmph

And 2x/3 of his journey at 36 kmph

According to the question,

(x/3)/24 + (2x/3)/36 = 10.5

x/72 + x/54 = 10.5

(3x+4x)/216 = 10.5

7x = 2268

x = 324 km.

* Bombay Presidency Association was founded in 1885 by Ferozshah Mehta, Kt Tailang and Badruddin Tyebji.

* It was marked as the beginning of an organised political activity and use of methods of constitutional agitation for the redressal of grievances with the establishment of the Congress

* Ferozshah Mehta acted as the president of INC in 1890.

Francis Buchana visited Rajamahal hills in early nineteenth century.

* He as a physician who came to India via Bengal Medical Service from 1794 to 1815.

* He also served as surgeon of Governor General, Lord Wellesley for few years.

* His description gives details of impenetrable Rajmahal hills, tribal culture, folk dances etc.

* The folk people living in Rajmahal hills were known as Paharias.

* They collected Mahua from forests, used shifting cultivation, and grew pulses and millets for consumption.

• NAGARAKA is the officer incharge of the city.

• City administration was run by city council.

• City council comprises 30 members.

• These 30 members were divided into boards of 5 members each.

• Each of these boards had specific responsibilities like that of Industrial produce, affairs of visitors, etc.

• According to Megasthenese Mauryan society was comprising of 7 castes.

• These are – philosophers, farmers, soldiers, herdsmen, artisans, magistrates, councilors.

• The four Varna system was also there.

• Megasthenese was failed to distinguish between Caste and Varna.