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प्रश्न
By weight, 90% of tomato and 78% of potato is water. Find the total quantity, by weight, of water in 90 kg of potato and 30 kg of tomato.
उत्तर
Water in tomato = 90% and water in potato = 78%
Total quantity of water in 90 kg of potato and 30 kg of tomato
= `(90xx78/100+30xx90/100)` kg
= `7020/100` kg + 27 kg
= 70.20 kg + 27 kg
= 97.20 kg
= 97.2 kg
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