An engineer who plans to build a compound wall on all sides of a
house must find the area of the compound.
If length of a rectangle is halved and breadth is doubled then the
area of the rectangle obtained remains same.
The side of a square is 10cm. How many times will the new perimeter
become if the side of the square is doubled?
(A) 2 times (B) 4 times (C) 6 times (D) 8 times
Sabina wants to cover the floor of her room whose length
is 4 m and breadth is 3m by square tiles. If each square
tile is of side 20cm, then find the number of tiles required
to cover the floor of her room.
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