Question

By weight,90% of tomato and 78% of potato is water. Find:
1)The weight of water in 25 kg of tomato.
2)The total quantity,by weight,of water in 90 kg of potato and 30 kg of tomato.

Answer 1

Dear student
$$\begin{gathered} 1)\mathrm{Let}\mathrm{the}\mathrm{total}\mathrm{weight}\mathrm{of}\mathrm{tomato}\mathrm{be}\mathrm{x}\mathrm{kg} \\ \mathrm{Then}\mathrm{the}\mathrm{weight}\mathrm{of}\mathrm{water}\mathrm{in}\mathrm{x}\mathrm{kg}\mathrm{of}\mathrm{tomato}=\mathrm{x}\times \frac{90}{100}=0.9\mathrm{x} \\ \mathrm{Weight}\mathrm{of}\mathrm{water}\mathrm{in}25\mathrm{kg}\mathrm{of}\mathrm{tomato}=0.9\times 25=22.5\mathrm{kg} \\ 2)\mathrm{Total}\mathrm{quantity}\mathrm{by}\mathrm{weight}\mathrm{of}\mathrm{water}\mathrm{in}90\mathrm{kg}\mathrm{of}\mathrm{potato}\mathrm{and}30\mathrm{kg}\mathrm{of}\mathrm{tomato} \\ =\left[\left(90\times 0.78\right)+\left(30\times 0.9\right)\right]\mathrm{kg} \\ =\left(70.2+27\right)\mathrm{kg} \\ =97.2\mathrm{kg} \end{gathered}$$
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