I will post tough quant questions

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A Clock loses exactly 24 minutes per hour. The Clock is now showing 3.00 A.M. If the clock was corrected a midnight and it stooped 1 hour ago, What is the correct time now
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hii ppl

this is anya sah

am doin computer engg (3rd yr) from mumbai.

will be taking CAT in 2005.

just wanted to introduce myself.

ciao

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The third equation is
r2*t + r2*(t+5) = 425 ( from the first statement that states the tank is filled by the 2 pipes open for t and (t+5) hours respectively)

Solving the three equations we get t = 15 or t = -4/3;

Hence t= 15 hours;

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This is the answer to the pipe problem.
The answer is that the first pipe is opened for 15 hrs. It's rate is 15 l/h. The other thus is opened for 20 hrs whose rate is 10l/h. Thus they fill together in 17 hrs.

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the medians of a triangle divide a triangle into four equal sides triangle.
also, the ratio of the area of a triangle formed by using the medians as sides to that of the original triangle is 3:4

This theorem exists.


If such a theorem exists, then it's wrong.
The answer is 3:2, and infact takes some skill to prove that. No formula remembring.
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ur question was pretty good. but if u c u could hav used ratios instead of variables it cud hav been easy. the ratios of the rate of pipes are aprx to 1:2 n so the time taken will be 2:1. so now it gets simple n the ans i get is 15hrs. hope its write.

waitin for reply :idea:

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the medians of a triangle divide a triangle into four equal sides triangle.
also, the ratio of the area of a triangle formed by using the medians as sides to that of the original triangle is 3:4

This theorem exists.

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Right answer. Except your reasoning is highly flawed 😃

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is it 3:2???..aint sure abt my approach.....
by summation of All median's by median formula for PQR we wld have...M1^2 + M2^2 + M3^2 = 3/2(PQ^2+ QR ^2 + QR^2)..
i then substituted PQ,QR and PR by length's which are in accordance with M1,M2 and M3...which are 6^1/2 ,..so on..all of em are in ratio 3/2 ^1/2 ..with sides of ABC..ao area in ratio 3:2..
i doubt this approach...waitin for correct answer if mine's wrong and a better approach...wat say CBM.. :wink:

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A triangle ABC has sides 3,4,5 respectively.
The triangle PQR has length of the medians as 3,4,5 respectively.

Ratio area(ABC)/area(PQR) ?

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plz solve....

susheel makes 100 calls to 10 people .he makes at least 4 calls to each person.
in how many ways can he distribute these hundred calls among the 10 people
irrespective of the order of the calls
1) 100 C 10
2)99 C 6
3) 60 C 6
4)69 C 9


answer i got is 10^60


a1 + a2 +....+a10 = 100
but each of a1, a2 starts with 4subtract 3from each.

a1 + a2+...+ a10 = 70
solutiuon in naturals is 69 C 9.
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