When the block lies on its side of dimensions 40 cm x 20 cm, it exerts
the same thrust.
Area= length x breadth
40 cm x 20 cm
800 cm2 = 0.08 m2
From Eq. (10.20),
49N
Pressure =
0.08 m2
= 612.5 N m-2
The pressure exerted by the side 20 cm
x 10 cm is 2450 N m2 and by the side
40 cm x 20 cm is 612.5 N m-2.
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