269913 A motor car\(\mathbf{A}\) is travelling with a velocity of \(20 \mathrm{~m} / \mathrm{s}\) in the north - west direction and another motor car B is travelling with a velocity of \(15 \mathrm{~m} / \mathrm{s}\) in the north-east direction. The magnitude of relative velocity of \(B\) with respect to \(A\) is.
269913 A motor car\(\mathbf{A}\) is travelling with a velocity of \(20 \mathrm{~m} / \mathrm{s}\) in the north - west direction and another motor car B is travelling with a velocity of \(15 \mathrm{~m} / \mathrm{s}\) in the north-east direction. The magnitude of relative velocity of \(B\) with respect to \(A\) is.
269913 A motor car\(\mathbf{A}\) is travelling with a velocity of \(20 \mathrm{~m} / \mathrm{s}\) in the north - west direction and another motor car B is travelling with a velocity of \(15 \mathrm{~m} / \mathrm{s}\) in the north-east direction. The magnitude of relative velocity of \(B\) with respect to \(A\) is.
269913 A motor car\(\mathbf{A}\) is travelling with a velocity of \(20 \mathrm{~m} / \mathrm{s}\) in the north - west direction and another motor car B is travelling with a velocity of \(15 \mathrm{~m} / \mathrm{s}\) in the north-east direction. The magnitude of relative velocity of \(B\) with respect to \(A\) is.