Question
M and N are two rectangular tanks. The base area of M is 90 cm2 while that of N is 30 cm2 . At first, M contained water to a height of 56 cm and N was empty, as shown.
  1. What was the volume of the water in M at first? 
  2. Luke then poured some water from M to N. After that, the height of the water level in M was thrice that in N.  What was the new height of the water level in M? 
3 m
(a)

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(b)

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M and N are two rectangular tanks. The base area of M is 90 cm2 while that of N is 30 cm2 . At first, M contained water to a height of 56 cm and N was empty, as shown.
  1. What was the volume of the water in M at first? 
  2. Luke then poured some water from M to N. After that, the height of the water level in M was thrice that in N.  What was the new height of the water level in M?