A number when increased by 40 %', gives 3570. The number is:

Correct option is A

Given:

A number when increased by 40% gives 3570. 

Solution:

​$$3570 = x \times (1 + \frac{40}{100}) \\\ \\3570 = x \times 1.40 \\\ \\x =\frac{ 3570 }{ 1.40} \\\ \\3570 = x \times 1.40 \\\ \\x = \frac{3570 }{ 1.40} = 2550$$​​

Thus, the number is 2550.