very simple...
each time a cylinder is added it increases by 1.1
So the required ans is
= (1.1)^9/(1.1)^12
= 1/(1.1)^3
= 1000/11*11*11
= 1000/1331(lol more simpler)
= 0.75 ...which is D
each time a cylinder is added it increases by 1.1
So the required ans is
= (1.1)^9/(1.1)^12
= 1/(1.1)^3
= 1000/11*11*11
= 1000/1331(lol more simpler)
= 0.75 ...which is D