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7. A cuboidal fish tank has a length of 30 cm, a breadth of 20 cm and a height of 20 cmThe tank is placed on a horizontal table and it is three-quarters full of water. Find thearea of the tank which is in contact with water. |
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Answer» Area of base=600cm2Perimeter of base =2(l+b)=100cmThree quarters is filled with water =>Up to aheight of 15 cm=>Area of tank in contact with the water=Perimeter of base × height of water column+area of base=100 × 15×600=2100cm2 |
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