Selina solutions

# Question 10

Q11) By weight, 90% of tomato and 78% of potato is water. Find :

(i) the weight of water in 25 kg of tomato.

(ii) the total quantity, by weight, of water in 90 kg of potato and 30 kg of tomato

(iii) the weight of potato which contains 39 kg of water.

Solution:

Water in tomato = 90% and water in potato= 78%

(i) Weight of water in 25 kg of tomato

=25\times90\%=\frac{25\times90}{100}

=\frac{90}{4}kg=\frac{45}{2}kg=22.5kg

(ii) Total quantity of water in 90 kg of potato and 30 kg of tomato

=(90\times\frac{78}{100}+30\times\frac{90}{100})kg

= 70.20 + 27 = 97.20 kg

= 97.2 kg

(iii) Weight of water in potato = 39 kg

Weight of potato = \frac{39\times100}{78}=50kg

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