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A field is 500 m long and 30 m broad. A tank 30 m long, 20 m

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Senior Manager
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A field is 500 m long and 30 m broad. A tank 30 m long, 20 m [#permalink] New post 27 Mar 2004, 10:40
A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and 12 m deep is dug in the field and the earth taken out is spread evenly over the field. Find the level of the field raised?
a)65 cm
b)35 cm
c)50 cm
d) 60 cm
e) 100 cm
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 [#permalink] New post 27 Mar 2004, 11:14
Area of the field -A , area of the tank-T , volume of the tank-V. A-T=15000-600=14 400 m^2. V=600x12=7200, so 14 400/7200=0,5 or c)
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 [#permalink] New post 27 Mar 2004, 14:17
given (500-20)30x = 30*20*12, find x

x = .5 m = 50 cm
  [#permalink] 27 Mar 2004, 14:17
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A field is 500 m long and 30 m broad. A tank 30 m long, 20 m

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