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Ruby bought a watermelon weighing 5 kg 200 g. Out of this she gave 2 kg 750 g to her neighbor. What is the weight of the watermelon left with Ruby?

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2.53 kg

2.35 kg

2.54 kg

2.45 kg

answer is D.

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Detailed Solution

Consider the given question,
Weight of the watermelon Ruby bought

= 5 k g 200 g

Weight of the watermelon Ruby gave is

= 2 k g 750 g

1kg=1000g

⇒ 1 g = 11000 k g

5 k g 200 g = 5 k g + 2001000 k g ⇒ 5 k g 200 g = 5 k g + 0.200 k g ⇒ 5 k g 200 g = 5.200 k g

2 k g 750 g = 2 k g + 7501000 k g ⇒ 2 k g 750 g = 2 k g + 0.750 k g ⇒ 2 k g 750 g = 2.750 k g

On subtracting we can find the weight of watermelon left,

5.200 − 2.750 ¯ 2.450 ¯

Hence, the weight of the watermelon left with Ruby is 2.45 kg.
Therefore, option 4 is correct.

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