Question

How many pieces of stone each of size 20 cm x 30 cm x 10 cm are required to construct a wall of 20 m x 60 cm x 2m?​

Answer 1

=> 4000 pieces

Step-by-step explanation:

First change m into cm

20m -> 2000cm

2m -> 200cm

volume of wall = 2000×200×60

=> 24000000 cm³

volume of each stone = 20×30×10

=> 6000 cm³

stone needed = 24000000/6000

=> 4000 pieces

Answer 2

4000 pieces of stones needed

Step-by-step explanation:

All measurements should be taken in cm unit wise

For wall:

• 20 m = 2000 cm

• 60 cm = 60 cm

• 2 m = 200 cm

For each stone:

• 20 cm

• 30 cm

• 10 cm

Volume of the wall:

• 2000 x 60 x 200

• 24000000 cm³

Volume of each stone:

• 20 x 30 x 10

• 6000 cm³

Pieces of stone needed:

• 24000000/6000

• 4000 pieces of stones