Question

A log of wood of dimensions 2 m x 20 cm x 10 cm is cut into small blocks of 10 cm
How many blocks do we get? What will be the total surface area of all these blocks ​

Answer 1

Answer:

Small block is 20

Surface area of all these blocks ​ is 2 sq meter

Step-by-step explanation:

Volume of the log of wood V= lbh =2 x 0.2 x 0.1 =0.04 meter cube

Volume of the small block is v= 0.1 x 0.2 x 0.1 =0.002 meter cube

Number of of small blocks we get after cutting = 0.04/0.002=20 blocks

therefore we will get 20 blocks

Surface area of the small block is S =2lb+2bh+2lh

=(2 x 0.1 x 0.2)+(2 x 0.2 x 0.1)+(2 x 0.1 x 0.1)

=0.04+0.04+0.02

=0.1 meter square

Therefore sureface area of all these bolcks is 20 x 0.1 =2 meter square

Surface area of all these blocks ​ is 2 sq meter