A cube has six identical square sides. Because both the length and width of a square are equal, the area of a square is a2, where a is the length of a side. Since there are 6 identical sides of a cube, to find the surface area, simply multiply the area of one side times 6.
It is easy to get duplicate copy of the acknowledgement of the income tax return acknowledgement if the income tax return has been filed online. You just need to login on https://incometaxindiaefiling.gov.in website if already registered. In case not registered , you can register with your mobile number and email id.
In this case, you should complete Form 4506 (PDF), Request for Copy of Tax Return, and mail it to the address listed in the instructions, along with a $50 fee for each tax return requested. Copies are generally available for returns filed for the current and past six years.