The heat loss across the outer wall of a room in a glass-sided building is calculated according to the formula: Heat loss ¼ U area of wall temperature difference across the wall, where U is a constant...

The heat loss across the outer wall of a room in a glass-sided building is calculated

according to the formula:

Heat loss ¼ U area of wall temperature difference across the wall, where U is

a constant known as the rate of heat transmittance

The temperature inside the room is 20C and the temperature outside the room

is 5C.

If the temperature measurements have an inaccuracy of 1% and the dimension

measurements (width and height of the wall) have an inaccuracy of 0.5%,

calculate the possible error in the calculated heat loss.