A) 3 min 20 sec
B) 5 min
C) 7 min 30 sec
D) 2 min 30 sec
Correct Answer: A
Solution :
In parallel \[\frac{1}{{{t}_{p}}}=\frac{1}{{{t}_{1}}}+\frac{1}{{{t}_{2}}}\] Þ \[{{t}_{p}}=\frac{{{t}_{1}}{{t}_{2}}}{{{t}_{1}}+{{t}_{2}}}\] \[=\frac{5\times 10}{5+10}=\frac{50}{15}=3.33\,\min \]\[=3\,min.\,20\,sec\]
You need to login to perform this action.
You will be redirected in
3 sec
