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Earlier discussion
4 older comments kept for context.
Creaty
Pressure=height ×density × gravity(acceleration due to gravity which is constant)
The rectangular block = L×b×h
Therefore L=40
B=25
H=5
I.e P=7800×5×10
=390,000
Therefore=3.90×\( 10^{4} \)\( N/m^{2} \)
Answer =B
Testimony Testimony
Pressure =density ×gravity ×height.
P=7800 ×10×(5/100) =3900 = 3.9 ×10^3.
N.B
The needed height is the smallest height which is 5cm =0.05m
Hakym K
Pressure = Density x Gravity x Height
P = 7800 x 40 x 10\(^{-2}\) x 10 = 31200
P = 3.12 x 10\(^{4}\) N/m\(^{2}\)
tabiti ezra
how did this happen