Question

4. By what amount area of a rectangle is to be increased, if its length and breadth are
increased by 30 units and 40 units respectively.
[Hint: Answer will be in terms of land b, where l and b are length and breadth of the
rectangle).​

Answer 1

Answer:

70 is the answer ok mark as brainlest

Answer 2

Answer:

Since the increase in length and breadth are given in absolute values it is not possible to deduce in absolute units the increase in are. It depends on the length and breadth.

For example, if we assume the old length and breadth to be l and b , the are is lb. The new area is (l+30) * (b+40) = lb+40l+30b+1200. The increase