Question

How many 20 cm long 14 cm wide bricks are needed to pave a rectangular floor 16 m long and 14 m wide:
a. 8000 b. 11200
c. 10000 d. 2800
Answers:​

Answer 1

Answer:

a. 8,000

Step-by-step explanation:

Step 1 : Find the area of the rectangular floor :

Dimensions of the floor (given) :

• length = 16metres.
• breadth = 14metres.

Area of the floor = (16 · 14)m²

= 224m²

Step 2 : Find the area of the block :

Dimensions of the block (given) :

• length = 20cm.
• breadth = 14cm.

Or, length = 0.20metres.

breadth = 0.14metres.

[∵ 1 metre = 100cm]

Area of the brick :

→ 0.20 · 0.14

→ 0.028m²

Step 3 : Find the required bricks :

Bricks required to pave the floor is :

→ Area of the floor ÷ Area of the brick.

→ 224 ÷ 0.028

→ 8,000 bricks.

∴ The bricks required to pave the floor is 8,000.

Answer 2

no,the right answer is 2800