According to the Pythagorean Theorem for calculating the lengths of a right angle triangle's sides, a^2 + b+2 = c^2, where c is the longest side (and the side opposing the right angle). So in your case it would be 150*150 + 70*70 = 27400. And √ 27400 is your answer.
The term pressure refers to the force per area created by the weight of anything whose weight is distributed over an area, such as the Earth's atmosphere, a lake, a gas inside a sealed jar, or a pointy high heel.
