Q4. A car of 800 kg is taking turn on a banked road of radius 300 m and angle of banking $30 ^ { \circ }$. If coefficient of static friction is 0.2 then the maximum speed with which car can negotiate the turn safely: $\left( \mathrm { g } = 10 \mathrm {~m} / \mathrm { s } ^ { 2 } , \sqrt { 3 } = 1.73 \right)$\\
(1) $264 \mathrm {~m} / \mathrm { s }$\\
(2) $51.4 \mathrm {~m} / \mathrm { s }$\\
(3) $70.4 \mathrm {~m} / \mathrm { s }$\\
(4) $102.8 \mathrm {~m} / \mathrm { s }$