Latest Others Aptitude Question SOLUTION: Fresh Grapes contain 90% water by wt. Dried grapes contain 20% water by %age. What will b wt of dried grapes when we begin with 20 kg fresh grapes? a) 2kg b) 2.4kg c) 2.5kg

• Placement Papers
• /
• Others
• /
• Logical Reasoning
• /
• Direction Sense

Others Question Papers:

Use 1,2,3,4,5,6,7,8,9 in sequece
condition are use + - * /  at least once 
and do not use twice the digits only use all once
and the result should be equal to 100

(#M40000373) OTHERS Logical Reasoning question Maths Puzzles Keep an EYE

Fresh Grapes contain 90% water by wt. Dried grapes contain 20% water by %age. What will b wt of dried grapes when we begin with 20 kg fresh grapes?

a) 2kg
b) 2.4kg
c) 2.5kg
d) none
please tell steps

Asked In Others Naveen (14 years ago)

Solved C.T.Narayanan Read Solution (4)

Is this Puzzle helpful?   (50)   (19) Submit Your Solution Direction Sense

Read Solution (4) :

C.T.Narayanan  (14 years ago)

2.5 kg

weight of water in fresh grapes is 18kg and grape is 2kg

in dried grapes , 2kg is grapes , so x/x+2 = 20%

x = 0.5

total = 2 + 0.5 = 2.5

Is this solution Helpfull? Yes (18) | No (14)  

Siddhartha Tarafder  (11 years ago)

Fresh grapes contain 90% of their wt as water, alrite. so wt of water in fresh 20 kg grape would be:

( 20/100) * 90 = 18 kg.

So the dry wt of grapes is 2 kg. This dry wt is not going to go watever you do with it.

now what would be the wt of dried grapes which contain 20% of water by wt?

suppose the total wt of dry grapes is W...

W= dry weight of grapes + 20% of W

=> W = 2kg + (W/100) * 20

=> W =2 kg + W/5

=> 2kg = W - W/5 = (5W - W)/5

=> 4W/5 = 2kg

=> W =(2*5)/4 =5/2 kg i.e. 2.5 kg
now the waight of water in dry grapes is 20 % of total weight which is 2.5 kg, so the wt of water would be:

wt of water= 20% of W= (W/100) * 20 = W/5 = 2.5/5 =(5/2)/5 = 5/ (2*5) = 5/10 = 0.5 kg

so the wt of water in dry grapes would be 0.5 kg...

Is this solution Helpfull? Yes (18) | No (3)  

priti ranjan  (9 years ago)

( 20/100) * 90 = 18 kg.
So the dry wt of grapes is 2 kg.
now what would be the wt of dried grapes which contain 20% of water by wt?
suppose the total wt of dry grapes is W.
W= dry weight of grapes + 20% of W
=> W = 2kg + (W/100) * 20
=> W =2 kg + W/5
=> 2kg = W - W/5 = (5W - W)/5
=> 4W/5 = 2kg
=> W =(2*5)/4 =5/2 kg i.e. 2.5 kg

ans c (2.5kg)

Is this solution Helpfull? Yes (4) | No   

rajapandi nagaraj  (7 years ago)

( 20/100) * 90 = 18 kg.
weight of water in fresh grapes is 18kg and grape is 2kg
dried grapes contains 20% water
grapes with water= (20/100)=0.5kg
so,total weight is 0.5+0.5*4=2.5kg

Is this solution Helpfull? Yes (1) | No (1)  

Please Login to Read Solution.

Use 1,2,3,4,5,6,7,8,9 in sequece
condition are use + - * /  at least once 
and do not use twice the digits only use all once
and the result should be equal to 100