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Two boats of base areas \( A_{1} \) and \( A_{2} \), connected by a string are being pulled by an external force \( F_{0} \). The viscosity of water is \( \eta \) and depth of the water body is \( H \). When the system attains a constant speed, the tension in the thread will be
(a) \( F_{0}\left(\frac{A_{1}}{A_{2}}\right) \)
(b) \( F_{0} \frac{A_{2}}{\left(A_{1}+A_{2}\right)} \)
(c) \( F_{0} \frac{A_{1}}{\left(A_{1}+A_{2}\right)} \)
(d) \( F_{\mathrm{o}}\left(\frac{A_{2}}{A_{1}}\right) \)
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