Question

1) The length and breadth of the floor of a hall are 420 cm and 260cm. how
many square tiles each of side 20cm are needed to cover the floor?​

Answer 1

Answer:

step1:- length = 420 cm and breadth= 260 cm

step2:-area of rectangle :- length × breadth

step3:-area of rectangle = (420 × 260) cm²

=109200 cm²

step4:- side of square tile = 20 cm

step5 :- area of square = (side)²

=(20)²=400cm²

step6:- number of tiles required = 109200/400

=273

273 number of tiles are required for covering the floor.

Answer 2

Answer:

273 tiles

Step-by-step explanation:

Given,

1) Length,l of the floor= 420cm,

2) breadth,b of the floor = 260cm,

3)Side,s of a square tile = 20cm.

To find,

Number of square tiles needed = ?

Solution :-

To find the number of square tiles,we need to find the area of the floor first and then the area of the tile. Then we need to divide both to get the answer.

1)area of a Rectangle,a = l x b (since by measurements we can say it is a Rectangle as the two sides are not same)

Area,a = l x b

a = 420 x 260

a = 109200cm² = area of the floor

2)area of a square,a = s²(since the tile is square shaped)

a = 20²

a = 20 x 20

a = 400cm² = area of one tile

3) number of tiles = area of the floor/area of one tile

N = 109200/400

N = 273

Hence, 273 tiles are needed to cover the floor.

HOPE IT HELPS