Question

If a wooden cuboid has mass of 20kg the length breadth and height found this wooden cuboid are 200,100,40cm find the pressure of the fuel which this block his kept

Answer 1

Answer : -

Given that,

Mass = 20 kg

Length = 200 cm

Breadth = 100 cm

Height = 40 cm

Assumption : -

Assume acceleration due to gravity g = 9.8 m/s²

But, this are in cm and not metre which is the SI unit of length. So, we've have to change this into it's SI unit.

As we know,

I00 cm = 1 m

.°. Length = 200 cm = 2 m

Breadth = 100 cm = 1 m

Height = 40 cm = 0.4 m

We know that,

Pressure = $\frac{Force\:(Thrust)}{Area}$

But we don't know the force and area here. But we can calculate it as,

Force = mass $\times$ acceleration

Force = 20 kg $\times 9.8 m/s^2$

Force = 196 N

Now, we'll find the area of the bottom of cuboidal wooden block.

Area = lb

Area = $2\:m \times 1\:m$

Area = $2\:m^2$

Now, we've gotta the values of force and area and we are abled to find out the pressure by using the following formula,

Pressure = $\frac{Force\:(Thrust)}{Area}$

Pressure = $\frac{196\:N}{2\:m^2}$

Pressure = 98 Pascal

$\huge{\boxed{\pink{Pressure=98Pa}}}$