Question

How to solve it step by step ​

Answer 1

Answer:

So, it's new volume = 440cm^3.

Explanation:

Given that,

Length = 20 cm.

Breadth = 10cm.

Height = 2cm.

Now, volume of cubiod = L × B × H.

so, putting the value on formulas,

V = 20 × 10 × 2.

$v = 400 {cm}^{3}$

Now, when we melt it then it's volume increases 10 percent so,

$v = 400 \times \frac{10}{100}$

By solving the above equation. we get,

$v = 40 {cm}^{3}$

Here the volume increases 40cm cube.

$so. \: \: 400 {cm}^{3} + 40 {cm}^{3}$

we get,

$v = 440 {cm}^{3}$

No, sure about answer.

Answer 2

Explanation:

Given:

L= 20 cm

W=10 cm

H= 2 cm

Vol of the rectangular bar, V= LWH= 400cm^2

When the L, W & H are incresed by 10%, the new:

L'= 20+20×10%= 22 cm

W'= 10+10×10%= 11 cm

H'= 2+2×10%= 2.2 cm

New increased vol, V' =L'W'H'= 22×11×2.2= 532.4 cm^2

10% of 400= 40. Hence, it is determined that the new volume is not incresed only by 10%.

Hope, the explaination is good and understandable and it helps!