Question

If length of rectangle and its perimeter is 20 cm and 75 cm. Find its area.​

Answer 1

Answer:

350 cm²

Step-by-step explanation:

• Length = 20 cm

• Perimeter = 75 cm

• To find B,

2(l+b) = P

2(20+b) = 75

40 + 2b = 75

2b = 75-40 = 35

b = 35/2 = 17.5 cm

• Area of rec = l * b = 20 * 17.5 = 350cm²

(hope it helps you)

Answer 2

Perimeter of the rectangle=75cm
Length of the rectangle=20cm
Breadth of the rectangle=‘x’cm
P=2(l+b)
75=2(20+x)
75=40+2x
2x=75-40
2x=35
x=35/2=17.5
Breadth of the rectangle=x=17.5cm
Area of the rectangle=l*b=20*17.5=350cm²