1st problem: Use the Pythagorean theorem: a^2+b^2=c^2 49+361=c^2 c^2=410 c=20.24 The answer is 20m
2nd problem: First calculate the height using the Pythagorean theorem: a^2+b^2=c^2 20^2+b^2=625 (i got 20 {radius} by half-ing the base edge length) 400+b^2=625 b^2=225 b=15
Next, solve for the volume: V=a^2*h/3 V=40^2*15/3 V=1600*5 V=8000
