name a few rulers who ruled this state in the historical days.
Harshavardhana, Sher Shah Suri and Akbar are some of them
Uttar Pradesh
In 1540 an Afghan, Sher Shah Suri, took over the reins of Uttar Pradesh after defeating the Mughal king Humanyun. Sher Shah and his son Islam Shah ruled Uttar Pradesh from their capital at Gwalior. After the death of Islam Shah Suri, his prime minister Hemu became the "de facto" ruler of Uttar Pradesh, Bihar, Madhya Pradesh, and the western parts of Bengal. He was bestowed the title of "Hemchandra Vikramaditya" (title of Vikramāditya adopted from Vedic Period) at his formal coronation took place at Purana Quila in Delhi on 7 October 1556. A month later, Hemu died in the Second Battle of Panipat, and Uttar Pradesh came under Emperor Akbar's rule. Akbar ruled from Agra and Fatehpur Sikri. 
hindi in all official work in utter pradesh UNANSWERABLE what is the capital of this state? Lucknow who is the current chief minister of this state? UNANSWERABLE what rivers are found here? Thirty-two rivers, including the Ganges and Yamuna among others what plants are found here? Mostly moist deciduous trees, and also scrubland vegatation like babool, medicinal ones like astringent etc.
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Uttar Pradesh [SEP] Medieval and early modern period
After the death of Islam Shah Suri, his prime minister Hemu became the "de facto" ruler of Uttar Pradesh, Bihar, Madhya Pradesh, and the western parts of Bengal. He was bestowed the title of "Hemchandra Vikramaditya" (title of Vikramāditya adopted from Vedic Period) at his formal coronation took place at Purana Quila in Delhi on 7 October 1556. A month later, Hemu died in the Second Battle of Panipat, and Uttar Pradesh came under Emperor Akbar's rule. Akbar ruled from Agra and Fatehpur Sikri. In the 18th century, after the fall of Mughal authority, the power vacuum was filled by the Maratha Empire, in the mid-18th century, the Maratha army invaded the Uttar Pradesh region, which resulted in Rohillas losing control of Rohilkhand to the Maratha forces led by Raghunath Rao and Malharao Holkar.