Question

6. A room is 12.5 m long and 8 m wide. A square carpet of side 8 m is laid on its floor. Find the
area of the floor which is not carpeted.
7. A lane, 150 m long and 9 m wide, is to be paved with bricks, each measuring 22.5 cm by​

Answer 1

Answer:

6) 36m²    7) 80,000 BRICKS

Step-by-step explanation:

Given  

The Length of the room= 12.5 m

The Breadth of the room = 8m

Area of the room = (length \times breadth)

=(12.5×8) m²

= 100 m²

Square carpet side= 8m

Area of the square carpet = (side)²

=(8)²

=64 m²

Area of the floor which is not carpeted = (Area of the room)-(Area of the carpet)

= (100-64)m²

= 36 m²

Hence, the rea of the room which is not carpeted is 36 m²

7) length=150 m

breadth= 9 m

the measure of each brick= 22.5 cm

No. of bricks required =Total Area/Area of 1 brick

150×9/22.5/100×7.5/100

=80000 bricks

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