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The weight of a container completely filled with water is 2.25 kg. The container weighs 0.77 kg when its 0.2 part is filled with water. The weight (in kg) of a container when 0.4 part of it is filled with water, is
Let the weight of the only container = a
Let the weight of only water when the container is completely filled = w
The weight of container when completely filled with water = 2.25 kg
$$=$$> w + a = 2.25 .................(1)
The weight of container when 0.2 part is filled with water = 0.77 kg
$$=$$> 0.2w + a = 0.77 ............(2)
Solving (1) - (2)
0.8w = 1.48
$$=$$> w = $$\frac{148}{80}$$ = 1.85 kg
From (1), 1.85 + a = 2.25
$$=$$> a = 0.4 kg
$$\therefore\ $$The weight of container when 0.4 part is filled with water = 0.4w + a = $$0.4\left(1.85\right)+0.4$$ = 1.14 kg
Hence, the correct answer is Option D
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