$\"\"$

Base of the triangle is $\"\"$ .

Altitude of the triangle is $\"\"$ .

Possible error in each measurement is $\"\"$ .

Since error given is possible error consider $\"\"$ .

Area of the triangle is $\"\"$ .

$\"\"$

Subustiute the values of $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$

The possible propogated error in computing the area of the square is $\"\"$ .