Question

The perimeter of the field is 320 m. If the length of a rectangular field is thrice its breadth, then find the area.

Pls answer fast!

Answer 1

Given:

• Perimeter of rectangle is 320 m
• Length of rectangle is thrice of breadth

To find:

• Area of rectangle

Solution:

Let breadth be x

So length of rectangle will be 3x

☆Perimeter of rectangle=2(L+B)

➠320m=2(3x+x)

➠320/2=4x

➠160m=4x

➠160/4=x

➠40m=x

So breadth of rectangle=x=40m

Length of rectangle=3x=3×40

=120m

As we know that formula to find area of rectangle is

Length×Breadth1

➠40m×120m

➠4800m²

So area of rectangle is 4800m²

More formulae to know!

• Area of square=side²
• Perimeter of square=4×Side
• Area of ∆=½×base×height
• Perimeter of ∆=sum of all sides.