Answered

Pronto press xan print an order of booklets in 4.5 hours.red dot printers xan do the same job in 5.5 hours.how longwill.it take if both presses are used?

Sagot :

1/4.5  + 1/5.5  =  1/x

LCD: (4.5) (5.5) (x)

1(4.5)(5.5)(x)  +  1 (4.5)(5.5)(x)  =   1 (4.5)(5.5)(x)
     4.5                         5.5                    x

(5.5)x + (4.5)(x)  =  (4.5)(5.5)(x)

5.5x + 4.5x = 24.75

10x = 24.75

10x/10 = 24.75/10

x = 2.475  or 2.5

Answer:  It takes 2.5 hours to finish the same job.