Time and Work (Math)
previous year question from ISI entrance exam 2018
need solution to question 26, answer given is (C) 45
32 Replies
@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.wait imma just go to sleep and see if anyone responds till morning
don't ping me to close the thread pls
The amount of project sone by 1 man in 1 day is 1/100 (intuitive).
Now, initially there are 5 men to do 5/100 work the next hour 5+4/100....the 9th hour there are 5+4+4+...(8 times 4)/100 people. The 10th hour the 5 people are relieved and hence the 10th hour work done is 4+4+4+....(9 times 4)/100. After this point, the work done per hour is constant.
*they are relieved at 11th hour my bad. But the logic remains same.
wouldnt it be their 11th hour? and not fixed 11th hour?
You are right, constant hai 11th hour onwards
also, i am getting 900? to cross check i put on an excel sheet lmao
*At the start of 11th hour ig? I forgot how to count for some reason ðŸ˜
Oh no, it would be the start of 10th hour.
my b fixing
not 900 xD
relieve after 10 hours, so 11th hour was fine
fun q
45 ;p;
https://1drv.ms/x/c/e04c0cdf29bcfe11/EcuR7P6YalFHh9I2-bQV7jwBhTFdpwzqs1GarV_C5pI20A?e=syR1kv
1 man in 1 day = 0.01 consignment is correct.
Initially there are 20 men, right?
this is the broad idea
so till 10 it is an ap
then constant
Ohh, I messed up values and stuff.
in a nutshell: hour 1 = 0.2 consignment, then ap till hour 10. then hour 11 onwards constant at 0.4
@iTeachChem verify, @BlindSniper (BS)
wow more responses than I expected
so i made a general formula
for such question type
yeah checking one sec
uh
woah
this is epic
thanks
dude how old are you?
this does not look like a 12th grader's work
I'm a little confused about your discussion however
why is the ap constant after the 10th hour?
it says in the question a worker is mandatory to be relieved every 10 hours right
so wouldn't that make it +4 every hour and -1 every 10 hours?
that's kind of the only doubt I had since I tried to search this up but it said constant ap there too so I wasn't sure how to proceed
18
it isnt
@CertifiedBrownMunda
Assuming the calculations and the words I couldnt read to be correct, seems solid to me
OHHHH
I FEEL SO DUMB
thanks habibi
waise mera exam kal hi hogaya
yeah makes sense
a little too advanced for me as of now
so I couldn't make use of that much
though I appreciate your input
Yea isi was kal na hoe was it
uga felt pretty solid
attempted 27 in that
not quite sure about ugb tho
+solved @TK
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