Bissoy.com
Doctors Medicines MCQs Q&A

The fresh watermelons has 95% water by weight. After some time only 30% water by weight is left. What is the weight of dry watermelon obtained from 42 kgs of fresh watermelon?

The fresh watermelons has 95% water by weight. After some time only 30% water by weight is left. What is the weight of dry watermelon obtained from 42 kgs of fresh watermelon? Correct Answer <span lang="EN-IN" style=" line-height: 107%; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">3 kg</span>

Calculation:

 

Water

Pulp

Fresh

95%

5%

Dry

30%

70%

 

Fresh watermelons have 95% water.

So, rest 5% will be pulp.

According to question -

100% fresh watermelon = 42 kg

⇒ 100% → 42 kg

⇒ 5% → 2.1 kg

Since, pulp remains same.

So, This 2.1 kg will be 70% of pulp of dry watermelons.

⇒ 70% → 2.1 kg

⇒ 100% → 3 kg

∴ The weight of dry watermelons obtained will be 3 kg.

Related Questions

Fresh watermelon contains 75% of water by weight, whereas dry watermelon contains 50% of water by weight. Radhika buys 100kg of fresh watermelons for a total price of Rs. 300. At what price per kg should she sell the dry watermelon (fresh watermelon are dried up) to earn 60% profit?
Fresh watermelon contains 80% water while dry watermelon contains 10% water by weights. What is the weight of dry watermelon from 25 kg fresh watermelon?
The average weight of a class of 12 students is 57 kgs. Two students of weights 48 kgs and 68 kgs are replaced by 2 new students having weights 52 kgs and 55 kgs. What is the new average weight of the class?
When 12 litres of water were added with some quantity of pure watermelon juice then the ratio of juice to water become 5 : 4 Quantity I: In the mixture, when 2 litres of pure watermelon juice are added then what will be the concentration of juice in the new mixture?  Quantity II: Instead of 12 litres of water, if 5 litres of water were added and the quantity of pure watermelon juice remained the same then what would be the concentration of pure watermelon juice  in the mixture?
The average weight of A, B and C is 40 kgs. Weight of C is 24 kgs more than A’s weight and 3 kgs less than B’s weight. What will be the average weight of A, B, C and D, if D weights 15 kgs less than C?
2.5 dozens of watermelons are purchased at the rate of Rs. 20 per dozen. 6 watermelons were found to be rotten. Remaining watermelons were sold at the rate of Rs. 22 per dozen. What was the gain or loss %?  
Three mangoes, four guavas, and five watermelons cost Rs. 750. Ten watermelons, six mangoes and 9 guavas Cost Rs. 1580. What is the cost of six mangoes, ten watermelons and 4 guavas?
Suhana bought a watermelon weighing 3.5 kg. The ratio of water to pulp in it was 13 ∶ 1. She had a dog at home which threw the watermelon off the table. Some of its water splashed out of it. The new concentration of water to pulp is 8 ∶ 1. What is the weight of this crushed watermelon?
The average weight of a group of 75 girls was calculated as 47 kgs. It was later discovered that the weight of one of the girls was read as 45 kgs. Whereas her actual weight was 25 kgs. What is the actual average weight of the group of 75 girls? ( Rounded off to two digits after decimal).
In a process, 5 Kgs of water is added to a container and after some interval 3 Kgs of water is taken out. If finally there is 7 Kgs of water then how much water was there in the very beginning?