A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N; calculate the efficiency of the machine By: Sunday|Published on: Nov 4|Categories: Physics JAMB| 0 comments A. 80.0% B. 76.6% C. 66.7% D. 60.7% Correct Answer: Option C – 66.7% Users Also Read These:A block and tackle system has 6 pulleys. If the…A block and tackle system has six pulleys. a force…The fiqure above represents a block-and-tackle…A machine has an efficiency of 60%. If the machine…A pulley system has three pulleys in the fixed block…SEE ALSO The operation of an optical fibre is based on the principal of?