Alright, lets get started.
Please refer the diagram I have attached.
There would be 4 sides of triangular shape and 1 base of square shape.
The base of the triangle is 4 feet and height is 5 feet.
So, area of the triangle would be =
square feet
As we know there would be 4 sides ,
So, area of 4 sides will be =
square feet
The area of base will be
square feet
So, total area will be =
square feet
Hence the surface area of tent will be 56 square feet. : Answer
Hope it will help :)