A) 16, 14
B) 12, 18
C) 12, 16
D) 8, 18
Correct Answer: B
Solution :
| [b] \[f=480=\frac{300-{{\text{v}}_{1}}}{300}\times 500\] |
| \[\frac{1440}{5}=300-{{\text{v}}_{1}}\] \[{{\text{v}}_{1}}=\frac{60}{5}=12m/s\] |
| \[530=\frac{300+{{\text{v}}_{2}}}{300}\times 500\] |
| \[1590=1500+5{{\text{v}}_{2}}\] |
| \[5{{\text{v}}_{2}}=90\] |
| \[{{\text{v}}_{2}}=18m/s\] |
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