imhimanshu wrote:
In a particular machine, there are 2 gears that interlock; One gear is larger in circumference than the other. The manufacturer of the gears guarantees that each gear will last for atleast 6,000,000,000 revolutions. Assuming that there is no slippage between the 2 gears and that when one gear rotates the other gear also rotates, the larger gear is guaranteed to last how many days longer than the smaller gear.
(1) The diameter of the larger gear is twice the diameter of smaller gear.
(2) The smaller gear revolves 600 times per minute.
Please put your reasoning across and then I will ask my doubt. I want to see if I am assuming much in this question.
Thanks
Given in the stimulus , One gear is bigger than the other.
Both gear will work till 6000000 revolution
Find the life of the larger gear.
Life of gear is a function of revolution they makes. "{They will last till 600000000 revolution-given in the question}
Revolution is dependant on the circumference and thus depends on the diameter of the gears.
Revolution is also dependant on the rate of revolution of gear per second or per minute or per hour
AIM:-Look out for Radius+Rate info
(1) The diameter of the larger gear is twice the diameter of smaller gear.
We got the relative radius info. We don't have exact radius values. And we are still missing rate of revolution
INSUFFICIENT
(2) The smaller gear revolves 600 times per minute.
Nice:- we got the rate info for smaller one since the smaller one and bigger one are connected so their rate will be same; but this statement doesn't talk about diameter
INSUFFICENT
COMBINE
we have the radius as well as rate info for both gear
SUFFICIENT
ANSWER IS C