Question

помогите, пожалуйста!

Answer 1

$10.$

$p = \frac{F}{S}$

$F = mg$

$F = 90 \times 10 = 900$ Н

$S = ab$

$S = 2 \times 0.12 = 0.24$м^2

$p = \frac{900}{0.24} = 3750$ Па

$11.$

$p = \frac{F}{S}$

$S = \frac{F}{p}$

$F= mg$

$F= 20 \times 10 = 200$ Н

$S = \frac{200}{400 \: 000} = 0.0005$ м^2