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Question
A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paisa per
m
2
is -
TK. 456
TK. 458
TK. 558
TK. 568
ANSWER : 3
Descrption
<pre> Bottom area = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>25</mn><mo>×</mo><mn>12</mn><mo> = </mo><mn>300</mn><msup><mi>m</mi><mn>2</mn></msup><mspace linebreak = "newline"/><mi>A</mi><mi>r</mi><mi>e</mi><mi>a</mi><mo> </mo><mi>o</mi><mi>f</mi><mo> </mo><mn>2</mn><mo>×</mo><mo> </mo><mi>w</mi><mi>a</mi><mi>l</mi><mi>l</mi><mi>s</mi><mo> </mo><mi>i</mi><mi>n</mi><mo> </mo><mspace linebreak = "newline"/><mi>l</mi><mi>e</mi><mi>n</mi><mi>g</mi><mi>t</mi><mi>h</mi><mo> </mo><mi>d</mi><mi>i</mi><mi>r</mi><mi>e</mi><mi>c</mi><mi>t</mi><mi>i</mi><mi>o</mi><mi>n</mi><mspace linebreak = "newline"/><mo> = </mo><mn>2</mn><mo>×</mo><mo>(</mo><mn>25</mn><mo>×</mo><mn>6</mn><mo>)</mo><mspace linebreak = "newline"/><mo> = </mo><mn>300</mn><msup><mi>m</mi><mn>2</mn></msup><mspace linebreak = "newline"/><mi>A</mi><mi>r</mi><mi>e</mi><mi>a</mi><mo> </mo><mi>o</mi><mi>f</mi><mo> </mo><mn>2</mn><mo>×</mo><mo> </mo><mi>w</mi><mi>a</mi><mi>l</mi><mi>l</mi><mi>s</mi><mo> </mo><mi>i</mi><mi>n</mi><mo> </mo><mi>l</mi><mi>e</mi><mi>n</mi><mi>g</mi><mi>t</mi><mi>h</mi><mo> </mo><mspace linebreak = "newline"/><mi>d</mi><mi>i</mi><mi>r</mi><mi>e</mi><mi>c</mi><mi>t</mi><mi>i</mi><mi>o</mi><mi>n</mi><mo> </mo><mspace linebreak = "newline"/><mo> = </mo><mn>2</mn><mo>×</mo><mo>(</mo><mn>12</mn><mo>×</mo><mn>6</mn><mo>)</mo><mspace linebreak = "newline"/><mo> = </mo><mn>144</mn><msup><mi>m</mi><mn>2</mn></msup><mspace linebreak = "newline"/><mo>.</mo><mo>'</mo><mo>.</mo><mi>T</mi><mi>o</mi><mi>t</mi><mi>a</mi><mi>l</mi><mo> </mo><mi>a</mi><mi>r</mi><mi>e</mi><mi>a</mi><mo> </mo><mo> = </mo><mo>(</mo><mn>300</mn><mo> </mo><mo> + </mo><mn>300</mn><mo> </mo><mo> + </mo><mn>144</mn><msup><mo>)</mo><mrow><mi>m</mi><mn>2</mn></mrow></msup><mspace linebreak = "newline"/><mo>.</mo><mo>'</mo><mo>.</mo><mo> </mo><mi>cos</mi><mi>t</mi><mo> </mo><mo> = </mo><mn>744</mn><mo>×</mo><mn>75</mn><mspace linebreak = "newline"/><mo> = </mo><mn>55800</mn><mo> </mo><mi>p</mi><mi>a</mi><mi>i</mi><mi>s</mi><mi>a</mi><mo> </mo><mspace linebreak = "newline"/><mo> = </mo><mi>T</mi><mi>K</mi><mo>.</mo><mn>558</mn></math> </pre>
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