Question

The ratio of the sides of a rectangle is 3 : 4. If breadth is 15 m, then find the perimeter and area.​

Answer 1

Answer:

Perimeter = 70m ,Area = 300m square

Step-by-step explanation:

Ratio of the sides of a rectangle = 3 : 4

Breadth = 15m

Therefore, length = (15m÷3)×4 = 5m×4 = 20m

Perimeter = 2(l+b) = 2(20m+15m) = 2×35m = 70m

Area = l×b = 20m×15m = 300m square

Answer 2

EXPLANATION.

Ratio of the sides of a rectangle is 3 : 4.

Its breadth is 15m.

As we know that,

We can write equations as,

Let one sides of rectangle be = 3x.

Let other sides of rectangle be = 4x.

Breadth = 15m.

⇒ 3x = 15.

⇒ x = 5.

Then other sides be = 4x = 4 x 5 = 20.

Length = 20m.

Breadth = 15m.

As we know that,

Formula of perimeter : 2(l + b).

⇒ 2(20 + 15).

⇒ 2(35) = 70.

Perimeter of rectangle = 70m.

Area of rectangle = L x B.

⇒ 20 x 15 = 300m².

Area of rectangle = 300m².