Question

In a system of pulleys, 2 turns of "A" will turn ``B" three times and 2 turns of “B" will turn “C” prime prime seven times. If pulley "A" turns 4 times, how many times will pulley mathcal ^ prime prime C^ prime turn?A) 21 B) 42 C) 14 D) 84

Answer 1

Since every two turns of "A", turns "B" three times, four turns of "A" will turn "B" six times. Four is two times two and six is two times three.

Using the same logic, since every two turns of "B" turns "C" seven times, now we're turning "B" six times. Three times the value it takes to turn "C" seven times, then, we just need to multiply seven by three.

`7*3=21`

If we turn "A" 4 times, then "C" will turn 21 times.