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Answer. 60 Kg.
Volume of blog = pi R2 L
Thickness is doubled and length is reduced by half
So R(final) = 2R
L(final) = L/2
So the new volume will be = pi(4R2)L/2
i.e. = 2pi R2L
so the volume will be doubled and also the weight will be
2.Repeated question of frog climbs 3 ft and fell back 2ft in a day.
How many day will he take to climb over 30 ft well.
Answer 28.
3) Repeated
XYZ and XYZ
+AB -AB
__________ _______________
C D E F BGA
then find the value of X,Y,Z ,G
Ans.
945 945
+78 -78
____________ _____________
1023 867
X â 9 Y - 4 Z - 5 G â 6
4}A class has 50 students, 26 boys and 24 girls. The principal divided the students in group of 30 and 20.
He doesnât know the exact no. of boys or girls in the group. But the proportion of no. of boys in group A is more than that of the no. of girls in group B.
Then tell the difference in no. of boys in group A and girls in group B.
Ans. 6.
The proportion i.e. Ab:Ag> Bb: Bg Thus Ab.Bg>Bb. Ag
Now from hit and trial method we find that Ab Ag Bb Bg
15 15 11 9 Ab. Bg
Thus Ab-Bg = 6
5) given a two digit no. 15. write down a digit before it and after it so that the 4 digit no. so formed can be divisible by 15.how many such combination are possible.(3 marks)
Ans 6. 1155, 4155, 7155, 3150, 6150, 9150
For divisible by 15 in decimal place either there will be 0 or 5 and the sum of the 4 digit should be divisible by 3.
6. A person has 4 enclosures of sheep. Each having different no. of sheeps. Once he counted the no. of sheep in all 4.
In 2nd he counted 255 and write it as @~!. In third counted 183 and write it as !@~.
For the 4th he write ~@! Then what is the no. of sheep in that.
I donât know the answer of this properly but I had written 78. how plz donât ask.
7. Miss X likes cold drink very much. And in exchange of 5 empty bottles she get one cold drink. So how many drinks she can have if initially she has 77 bottles.
Answer 19
With exchange of 75 bottles she get 15 drinks so now she had 17 bottles 15 drinks
In exchange of 15 bottles she get 3 drink and left with 5 bottles 3 drinks
In exchange of those 5 bottles she get 1 only 1 drinks
---------
19 drinks
8). There are 3 friends Geoffery, Molly and Hallmann
Geoffery said
â I m 22 years old â, âmolly is 1 year younger than meâ, and âhallmann is two year older than meâ
Molly said
âGeoffery is 23 years old â,âmy and hallmann has 3 years difference in ageâ,
And one more statement is there
Similarly hallmann has given three statement.
If any of the two statement from each person is true find the age of them.
Answer
Geoffery: 23 molly: 22 hallmann : 25
9) itâs a repeated question of 4 girls making fruit salad using 4 fruits etc.
10) after putting the watches back in the evening before the night as the summer ends.
Mr X called his solicitor to fix a meeting in the next morning.
Mr X: we will meet 11 hour after the town hall clock will take 10 secs to strike the hour
Solicitor : doesnât the town hall clock have 1 sec interval in consecutive strike
Mr X: yes.
So find out at what time they will meet?
Answer 5 am in morning.(plz check out not sure)
