Three slices of bread are to be toasted under a grill. the grill can hold two slices at once but only one side is toasted at a time. it takes 30 seconds to toast one side of a piece of bread, 5 seconds to put a piece in or take a piece out and 3 seconds to turn a piece over. what is the shortest time in which the three slices can be toasted?

175 seconds,  

32 slices of toast

Step-by-step explanation:

20/5  = 5 times

5 (35) = 175 Seconds to make 20 slices of toast

2> 35 seconds to make 4 pieces of toast

60 (4)  =  240

240  + 40 = 280

35/280  = 8

8 (4) = 32 slices of toast

So, Anwers are:

1>    175 seconds to make 20 slices of toast.

2>   32  slices of toast they can make as many times as possible in

4 minutes and 40 seconds.

Hope that helps :)

02/16/2021

34

step-by-step explanation: