Amirfunc wrote:
Hi All,
In such questions where we pick numbers, is there a general strategy that we should keep in mind?
I am not able to follow any of the explanations above, for instance, the first explanation in this post takes L=20 and W=10 and H=10 ( no idea, how that is taken)
Would appreciate any help on this.
Also I tried the question in this way and go the incorrect answer
Old Volume= LWH Old Price= P -> Volume/Price=LWH/P
New Volume= LWH(1-50/100)= LWH/2 New Price=P/2 -> Volume Price=LWH/P
Where am I going wrong
Adding the experts if they can help with this-
Bunuel,
chetan2uThanks,
point wise replies...
1) Strategy for choosing number
you should choose number that can make your calculations easier..
here you are reducing each of teh dimensions by 50% or 1/2, so choose even numbers so that each after halfing is a integer..
had it been 1/3, you should have taken multiple of 3...
and choose number that ease your calculation, so 10*10*10 will be better than 24*12*12
2)
Quote:
Old Volume= LWH Old Price= P -> Volume/Price=LWH/P
New Volume= LWH(1-50/100)= LWH/2 New Price=P/2 -> Volume Price=LWH/P
where you hav egone wrong is that we are doing 50% of EACH dimension and not the VOLUME..
New Volume= LWH(1-50/100)(1-50/100)(1-50/100)= LWH/8 New Price=P/2 -> Volume Price=(LWH/8)/(P/2)=2LWH/8P=lwh/4p
lwh/4p is 4 times of lwh/p so extra paid is 4-1 = 3 times and hence 300%..