Question

A factory manufactures a metal piece in 32 minutes. New technology allowed the factory to cut that time by 8%. Then another improvement cut the time by 5%. How long does it take to manufacture the piece now? Round your answer to the nearest minute

Answer 1

28 minutes

Explanation:

we know that

1) A factory manufactures a metal piece in 32 minutes

2) New technology allowed the factory to cut that time by 8%

Remember that

`100\%-8\%=92\%=92/100=0.92`

In this part 32 minutes represent the 100%

To find out how long it take to manufacture the piece, multiply 32 minutes by the factor 0.92

`32(0.92)=29.44\ min`

3) Then another improvement cut the time by 5%

Remember that

`100\%-5\%=95\%=95/100=0.95`

In this part 29.44 minutes represent the 100%

To find out how long it take to manufacture the piece now, multiply 29.44 minutes by the factor 0.95

`29.44(0.95)=28\ min`