Answer:
10.26secs
Step-by-step explanation:
Let's start by converting 3minutes 15seconds to second
How
60secs=1min
Xsec=3mins
Let's cross multiply
x=60×3
X=180secs
180+15
195secs
So 19 copies=195 secs
1copy=x sec
Cross multiply
19x=1×195
19x=195
Divide both sides by 19
X=10.26secs
