Answer:
Overall ideal mechanical advantage of the machine = 40
Explanation:
Given:
Ideal mechanical advantage of three machine = 2, 4, 5
Find:
Overall ideal mechanical advantage of the machine
Computation:
Overall ideal mechanical advantage of the machine = 2 × 4× 5
Overall ideal mechanical advantage of the machine = 40
Diverging Diamond Interchange
Measure the longest circuit and add 50% for fittings and terminal units.
Answer: LED have the lowest cost of operation.
Explanation:
If we ignore the initial procurement cost of the items the operational cost of any device consuming electricity is given by

Among the three item's LED consumes the lowest power to give the same level of brightness as compared to the other 2 item's thus LED's shall have the lowest operational cost.