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saranya 12 years ago

a and b starts from their house at 10am. they travek from their house on MG road at 20kmph and 40kmph. they meet at T junction at 12:00 pm B reaches the T junction earlier and turns right .Both of them continue travelling till 2:00pm what is distance between a& b at 2:00pm?
answer:120
how??can anyone explain

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harsha vardhan veeturi 12 years ago

a covers 20 km in 1hr and b covers 40km in 1 hr @12:00pm b crosses the T junction first and continues to travel till 2pm so her covers 80km and while a coverse 40 km in 2hrs till 2 pm so they are apart of 120km.

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saranya to mohit ranjan basak 12 years ago

In a 3*3 square grid comprising 9 tiles each tile can be painted in red or blue color. When the tile is rotated by 180 degree, there is no difference which can be spotted. How many such possibilities are there?
a) 16 b)32 c)64 d)256
Please someone explain this clearly..
y do u choose 2^5..five titles to be painted??
there are totally 9tiles..y painting 5??this is my post

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KABILDEV 12 years ago

for 3*3 grid having 9 tiles.we can put 1 to 5 we can make all tiles can be filled by color.so we are taken 2^5

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saranya 12 years ago

how do u say 5thats my qn

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saranya to Vaibhav Mishra 12 years ago

Professor absentminded has a very peculiar problem, in that he cannot remember numbers larger than 15. However, he tells his wife, I can remember any number up to 100 by remembering the three numbers obtained as remainders when the number is divided by 3, 5 and 7 respectively. For example (2,2,3) is 17. Professor remembers that he had (1,1,6) rupees in the purse, and he paid (2,0,6) rupees to the servant. How much money is left in the purse?
option
A. 59
B. 61
C. 49
D. 56
can u pls explain answer for dis qn...
how do u find that 76????????????

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jyothi Am 12 years ago

cngrtz:)n pls share ur experince...? tel me from how many days did u prepare..?

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Rahul Kumar 12 years ago

take the highest num ie. 7 We get reminder 6 for..... 13,20,27,34,41,48,55,62,69,76,83,... ..match this list with 5 we get ,reminder 1 only for 41,76 ..now u can see easily that value ur finding is 76 ..similarly u'l get 20 and answer is 76-20 = 56

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sandy 12 years ago

@ SARANYA
i dont know the correct procedure but i got the answer by a process
it might be helpful to u
LET THE AMOUNT HE HAD BE X
IN THE QUESTION IT IS GIVEN THAT WHEN X IS DIVIDED BY 3,5,7 LEAVES REMAINDERS 1,1,6
LETS TAKE THE LAST NUMBER I.E 7
X%7=6...I.E THE NUM IS 7Y+6
POSSIBLE VALUES OF Y ARE FROM 1 TO 13
THEN X MAY BE FROM 13,20,27,....76,83,90,97
THEN DIVIDE THE ABOVE NUMS BY 3 AND 5 THE NUM WHICH LEAVES REMAINDERS 1,1 IS THE REQUIRED NUM
this might look like a big process but you can calculate the num in your mind.
HOPE THIS IS HELPFUL
THANK U

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ITHA Naresh Babu 12 years ago

@saranya
,since we are getting the same remainder when divided by 7 before & after,the amount left must be a multiple of 7.so from options,check for reaining conditions...

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saranya to suparna guha 12 years ago

answer is 4,but please any one justify the answer.there are two pans..why should the standard weight be 4??

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saranya to muttareddy veera mani devi 12 years ago

of the 38 people in my office,10 like choclate,15like cricket,2 like none.How many people likeboth??
ur ans was 18=10+15-X;
bt how does 18 arises at the left side is my doubt??

Reply Like? Yes (1) | No (1)

sangeetha 12 years ago

ur question is wrong.that is 20 like none..
so by union and intersection formula,
n(A ∪B) = P(A) +P(B)−P(A ∩B)
n(A∪B)=total no.of people -no. of people who like none=38-20=18
so,substituting,18=10+15-X
X=7

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sangeetha 12 years ago

the formula is n(A union B)=n(A)+n(B)-n(A intersection B)

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saranya 12 years ago

18=10+15-X;
here what is the formula that is being used??
38-20=18(whether this Aunion B or A intersection B)
p(A)+P(B)-x=18
here what is 18 and x?please clear this doubt

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saranya 12 years ago

if X is A intersection B that is who likes both then what is 18???
i could nt understand

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RAFEEK AHAMED.H 12 years ago

nice explanation Sangeetha...

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