density = mass/volume
50 kg to g
50*1000 = 50,000 grams
200 mm to cm
200*0.1 = 20 cm
Substitute: 0.8=50,000/volume of a cylinder
volume of cylinder= (pi)(r^2)(h)
volume of cylinder=(pi)(20^2)(h)
0.8=50,000/((pi)(20^2)(h))
0.8=50,000/400*pi*h
50,000/0.8=400*pi*h
62,500=400*pi*h
62,500/(400*pi)=h
h≈49.74 cm
