Question

. A square piece
of paper of perimeter 24 cm is cut off from it. Find the area of the piece of paper left.
11. The floor of a room of size 7 m 50 cm x 4 m is to be covered by rectangular tiles of size
60 cm by 50 cm. Find (1) the number of tiles required to cover the floor of the room and
(1) the total cost if one dozen tiles cost 300.
12. A square carpet of side 5 m is laid on the floor of a room of length 5 m 50 cm and breadth
6 m. Find the area of the floor that is not carpeted
I WILL FOLLOW THE PERSON WHO WILL GIVE THE CORRECT ANSWER AND UNNECESSARY COMMENTS WILL BE REPORTED​

Answer 1

Explanation:

Answer

Length of a rectangular hall L=40 m

Breadth of the rectangular hall B=18 m

So, the area of hall

=L×B=40×18=720 m

2

Since,

Length of tiles l=1 m

Breadth of tiles b=50 cm=0.5 m

So, the area of each tile

=l×b=1×0.5=0.5 m

2

Therefore, the numbers of tiles are required

=

0.5

720

=1440