Question

What is the missing width of the speaker below when its volume is 30,000 cm3 ?

Answer 1

Answer:

Width = 20 cm.

Step-by-step explanation:

Given : A cuboid  of volume 30, 000 cm³ with length 30 cm and height 500 mm.

To find : What is the missing width of the speaker below when its volume is 30,000 cm³ .

Solution : We have given that

Volume of cuboid = 30,000 cm³.

Length = 30 cm .

Height = 500 mm .

1 mm = $\frac{1}{10}$ cm.

500 mm =  $\frac{500}{10}$ cm.

500 mm = 50 cm.

Then height  = 50 cm .

Volume of cuboid = length * width * height .

Plugging the values of volume , length , height .

30,000 = 30 * width * 50 .

30,000 = 1500 * width .

On dividing both side by 1500 and switching the sides.

Width =  $\frac{30000}{1500}$.

Width = 20 cm.

Therefore, Width = 20 cm.

Answer 2

3,000,000 mm / 300 mm = 10000 mm
10,000 mm / 500 mm = 20 mm

20 mm OR 0.2 cm