Question

please!please!give me solution

Answer 1

1st let us find the area of rectangular room = l × b = 40 × 25 = 1000 m²

now let us calculate the area formed with road around the rectangular room

if road is added to the rectangular road then length of the area formed is increased by 2.5 + 2.5 = 5m and the total length = 40 + 5 = 45m

similarly the breadth of the area formed is increased by 2.5 + 2.5 = 5m and the total breadth = 25 + 5 = 30m

so the area with road around the rectangular room is 45 × 30 = 1350 m²

now if we subtract the area with road around the rectangular room and actual rectangular room we get the area of the road

area of the road = 1350 - 1000 = 350 m² = 3500000 cm²

area of one piece = 50 × 70 = 3500 cm²

then number of pieces required for covering the entire road is

(3500000 cm² × 1)/3500 = 1000 pieces

So 1000 pieces are required for covering the entire road.

Answer 2

Here is your answer

Length of rectangular room = 40m
Breadth of rectangular room = 25m

Area of rectangular room= l x b = (40x25)m² = 1000 m².

Now, the length of road = (2.5x2) m = 5 m
Length of rectangular room along with road= (40+5) m = 45m

Breadth of rectangular room along with road =(25+5)m = 30m

Area of rectangular room along with road= l x b
=> (45x30)m²
=> 1350m²

Area of road= Area of rectangular room along with road - Area of rectangular room.

Area of road= (1350-1000)m²
Area of road= 350m²

Now,

=> 350m² = (350x10000) cm² = 3500000 cm².

Area of Tiles = l x b

Area of Tiles= (50x70)cm²
Area of Tiles= 3500cm²

No. Of pieces= Area of Road/Area of Tiles

No. Of pieces= (3500000/3500) cm²/cm²

No. Of Pieces= 1000


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