given that diameter = 140cm ⇒radius = 70cm, volume of cylinder = 200litres = \(200,000cm^3\) volume of cylinder = base area times height = \(\pi r^2h\) \( 200,000cm^3 = \frac{22}{7} \times 70 \times 70 \times h\) \(200,000 = \frac{107,800h}{7}\) cross multiply 1,400,000 = 107,800h \( h = \frac{1,400,000}{107,800}\) = 13cm (to the nearest cm).