Answer copied in whole from brainly user spsharvesh2008, posted July 2020 on the exact same question here:
https://brainly.in/question/20022562
Answer:
Mohammed bin Tughlaq made many mistakes dring his reign, 1325 to 1351
the biggest mistakes committed by Muhammad Tughlaq are as follows
■Taxation in the doab( fertile region between the Ganga and Yamuna rivers) - He increased the tax in the doab region. But his timing was not right. The doab region was facing a severe famine. Many peasants had to move away from the region. Some of them also revolted. So, the king had to withdraw its orders.
■Shift of Capital - The sultan thought that if he shifted the capital from Delhi to Devagiri, which he remaned Daulatabad, he could control the mepire better. He also thought he could be safe from the Mongol raids. He ordered the entire populationof Delhi to move to Daulatabad. This angered many people, but they had to move. Then after they moved, the Sultan realized that it was impossible to look over the northern frontiers. So he ordered the population to move back to Delhi. This affected the prestige of the empire.
■Token currency - There was a worldwide shortage of silver during his reign, so the Sultan issued brass and copper coins. They had the same value as silver coins. They could be exchanged for silver coins in the royal treasury. The design on these coins were simple and brass and copper were cheap, so the ordinary craftsmen could make them very easily. Money lost its value. The royal treasury flooded with brass and copper coins.