Question

Friends please solve this question. it's very very important. I need it very very much-

A cuboidal fish tank has a length of 30 cm, a breadth of 20 cm and a height of 20 cm. The tank is placed on a horizontal table and it is three-quarters full of water. Find the area of the tank which is in contact with water.

Answer 1

The Length and Breath Covered By Water is equal as Tank's Length and Breath.

i.e., L= 20cm B = 20cm

But Height is 3/4 th ( three-quarters ) of Tank's Height

So, H = 20×3/4 = 15cm

Area of the Tank is in Contact with Water,

A = 2(LH+BH) + LB

(Since, Top surface of water is not in Contact with Tank)

A = 2(30×15+20×15)+30×20

A = 2(450+300)+600

A = 2×750+600

A = 1500+600

A = 2100cm²