can you explain why the answer is A here??
when i answered it i got 2 since every 4 rotates of pulley A is gonna rotate pully c one time because the cross of c is 4 times more than that of A??
hi. these are from TSA exams you should take their exams they are really helpful.
just one more thing and i am sorry if i am being dumb but i dont understand why 8 turn in A/D gives us 1 in C??
tho its cross in 1 and c is 4 so it requires 4 turn for A to get one turn in C. that’s how i thoght of it. i know its wrong but can u tell me how u thought of it and why mine is wrong??
thx
I will practice them 
thanks !
You’re not dumb at all!
Because C is 4 times bigger than A and D, and also the distance between C and a is four times more than the distance between C and d.