A manufacturer of roofings Ltd produces two types of steel. Type 1 requires 2 hours of melting, 4 hours of rolling and 10 hours of cutting. Type 2 requires 5 hours of melting, 1 hour of rolling and 5?

hours of cutting.

To find the total time required to produce each type of steel, we add up the individual time requirements for each step.

For Type 1 steel:
Melting: 2 hours
Rolling: 4 hours
Cutting: 10 hours
Total time for Type 1 steel = 2 + 4 + 10 = 16 hours

For Type 2 steel:
Melting: 5 hours
Rolling: 1 hour
Cutting: 5 hours
Total time for Type 2 steel = 5 + 1 + 5 = 11 hours