Question

2. Find the breadth of the rectangle whose.
(a) Area = 315 mm' and length 21 mm​

Answer 1

Answer:

15 mm

Step-by-step explanation:

Area = length * breadth

Breadth= area / length

            =  315 / 21

            = 15 mm

Answer 2

$area \: = l \times w \\ 315^{2} = w \times 21 \\21w = \: 17.75 \\ w = \: 17.75 \div 21$

I'm not sure if it's like this or not but this is the formula, hope it helps!!