Question

a rectangular tank of dimensions 30×12×20 cm is 1/2 full of water. Find the volume of the water in tank. How much more water is needed to make the tank 3/4 full
Pls answer urgently step by step explanation, I will mark brainliest ​

Answer 1

Answer:

Volume of the water in tank:

Volume of rectangular tank = L×W×H(Length× Width×Height)

= 30×12×20 = 7,200÷2 ( 1/2 full of water )

= 3,600 i.n

Water needed to make the tank 3/4:

=3,600×3

=10,800 i.n

Step-by-step explanation:

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Answer 2

Answer:

Volume of water must be poured in tank =1399.98cm  ³  =1.4litre

Step-by-step explanation:

Volume of water in tank=30×20×6=3600cm³  

volume of cube=10³ =1000cm  ³

 Volume of water in tank + Volume of cube=4600cm³

Let, height be h

∴Height of the water when volume is 4600 in the tank of length=30,breadth=20 is,

⇒30×20×h=4600

⇒h=7.667cm

Difference in height when cube submerged in tank=10−7.6667=2.333

Volume of water must be poured in tank=30×20×2.333=1399.98cm  ³

=1.4litre

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