Question

By what amount area of a rectangle is to be increased, if its length and breadth are increased by 30units and 40units respectively. (with explaination ) ××no wrong answers​

Answer 1

Answer:

Let L = initial length

Let W = initial breadth

Let I = increase in area…Then…

I = (L+30)(W+40) - LW

I = LW +30W +40L +1200 - LW

I = 30W +40L +1200