Question

By what amount area of rectangle is to be increased if its length and breadth are increased by 30 unit and 40 unit respectively

Answer 1

ANSWER = 1200 UNIT
EXPLANATION:
LENGTH = L + 30
BREATH = B + 40
AREA = L × B = LB + 1200
INCREASED BY: 1200

Answer 2

Hence the area of rectangle is to be increased by amount of 1200 sq unit.

Step-by-step explanation:

Given:

We have length = 30 unit

Breadth B = 40 unit

Area of rectangle = $length \times breadth$

                               = $30 \times 40$    

                               = 1200 sq unit.

Hence the area of rectangle is to be increased by amont of 1200 sq unit.