The following figures are of equal area. Which figure has the least perimeter?

(a)

(b)

(c)

(d)

If two identical rectangles of perimeter 30 cm are joined together, then the perimeter of the new shape will be

(a)

equal to 60 cm

(b)

less than 60 cm

(c)

greater than 60 cm

(d)

equal to 45 cm

If every side of a rectangle is doubled, then its area becomes _____ times

(a)

2

(b)

3

(c)

4

(d)

6

The side of a square is 10 cm. If its side is tripled, then by how many times will its perimeter increase?

(a)

2 times

(b)

4 times

(c)

6 times

(d)

3 times

The length and breadth of a rectangular sheet of a paper are 15 cm and 12 cm respectively. A rectangular piece is cut from one of its corners. Which of the following statement is correct for the remaining sheet?

(a)

Perimeter remains the same but the area changes

(b)

Area remains the same but the perimeter changes

(c)

There will be a change in both area and perimeter

(d)

Both the area and perimeter remains the same