It takes the elf 80 seconds (1 minute and 20 seconds) to cut a sheet completely into strips, because 10 cm : strips of 2 cm=5 pieces and 4 cuts * 20 seconds each=80 seconds (the last cut makes two strips at once).
The elf can cut 5 strips out of the sheet. Since each strip takes 20 seconds it will take 5 x 20 = 100 seconds for the elf to cut the 10 x 10 piece of wrapping paper completely.
it would take an elf 80 second to cut the paper into strips as there are 5 strips per sheet and it requires 4 cuts to divide it into 5. 4 x 20 = 80.
however the question doesnt ask how long it takes for an elf to cut it. for me it would take about 15 seconds as I am much quicker than an elf
The elf 20 seconds cuts 2cm x 10cm strips. Out of 10cm x 10cm sheets the elf can cut 5 (2cmx10cm) strips.
So the correct answer is 5x20 seconds= 100 seconds.
The elf need 80 seconds, or one minute and 20 seconds. That is because 10:2 = 5 but the last wrap will be the fourth because we will obtain from that the fourth and also the fifth piece .
80 seconds total. if the elf needs to cut the whole 10x10 paper into 2x10 strips, that's 4 cuts in total (resulting in 5 strips of 2x10). 4x20=80 seconds.
One minute and twenty seconds. https://www.google.com/url?sa=t&rct...-1235125655/&usg=AOvVaw033eEoN4yC75B8lGlEUtJq
A 10cm x 10cm sheet can be cut into five 2cm x 10cm strips (10 ÷ 2 = 5). It takes four cuts to cut a sheet into five strips (the last cut cuts the remaining paper in half, creating two strips from one cut). 4 × 20 = 80. Eighty seconds is one minute and twenty seconds.