If the area of rectangular plot is 180 sq. m and its length is 15 m, then its breadth is

1. 12 m

2. 12 cm

3. 60 m

4. 9 m

If the length and the breadth of a rectangle are doubled, then its perimeter

1. remains the same

2. doubles

3. becomes four times

4. becomes half

If the sides of a square are halved, then its area

1. remains same

2. becomes half

3. becomes one-fourth

4. doubles

In the adjoining figure, a square of side 1 cm is joined to a square of side 3 cm. The perimeter of the new figure is

1. 13 cm

2. 14 cm

3. 15 cm

4. 16 cm