Question

A small island has a roughly rectangular shape. It is 18.2 kilometers wide and 28.5 kilometers long. Rising water levels are reducing the width by 1.2%each year and the length by 0.8% each year.

Answer 1

Here's the answer ;)

Answer 2

2% area reduction

Explanation:

The original area is 18.2*28.5=518.7 sq km

1.2% reduction of 18.2 km is 17.9816 km (18.2-18.2*1.2/100)

0.8% reduction of 28.5 km is 28.272 km (28.5-28.5*0.8/100)

The new are is 17.9816*28.272=508.3757 sq km (98 % of the original area)

Another way is (100-1.2)*(100-0.8) LW/(100*100)=0.98LW (98 % of the original area)