a cylindrical tank of radius 2.5m and height 1.6m initially contains water of depth of 20cm .water is pumped into the tank at the rate of 1.35litres per second.giving your answer in the nearest minute calculate the time in hours and minute it takes to fill the tank
20cm=0.2m 1.6m-0.2m=1.4m radius=2.5, area of circle=19.635m^2 19.635m^2x1.4m=27.489m^3 1litre=0.001m^3 1.35litres=0.00135m^3 27.489^3/0.00135m^3=20362s 60s=1min 20362s/60s=339.37min =5 hours and 39 minutes (intermediate steps are left in 5s.f.) hope this helps
