Option 3 : 3675 N/m2

Mass of the wooden block **m =15 kg**

**Dimensions of block = 80 cm × 50 cm × 20 cm**

Thrust on the top of the table is due to the weight of the wooden block. Now,

Weight of the block = **F = mg = 15 x 9.8 = 147 N**

**Area of the side = l x b = 40 x 10 = 400 cm ^{2} = 0.04 m^{2}**

**Pressure = Weight / Area = 147 / 0.04 = 3675 N/m ^{2}**