Question

a) It takes 3645 seconds to fill a cubical water tank at the rate of 5 second per litre. Find the capacity of the tank. If 1 litre = 1000 cm³, find the inner length of the tank. Also, find the total surface area of the tank.​

Answer 1

Explanation:

Capacity=3645/5=729 litres

1 litre=1000 cm³

729 litres=1000×729 cm³

if x is the edge of cube,then

x³=1000×729 cm³

=10³×9³ cm³

x=10×9=90 cm

surface area=6x²=6×90²=6×8100=48600 cm²