Question

why was the taxation in a doab region a failure

Answer 1

because of high way robbery

Answer 2

i) In 1326, Muhammad bin Tughlaq increased the taxation in Doab.

ii) Unfortunately, a severe famine broke out due to the failure of rains.

iii) The cultivators were, therefore, forced to abandon their land.

iv) Since people had nothing to eat, they utilised the loans to meet their basic needs. As a result,even the usual revenue could not be realised

Therefore,the scheme failed.