s = 75 k m / h \cdot \frac{76}{60} h + 80 k m / h \cdot \frac{66}{60} h = 183 k m

${s= {75}\,\mathrm{km/h}\cdot\frac{76}{60}\,\mathrm{h} + {80}\,\mathrm{km/h}\cdot\frac{66}{60}\,\mathrm{h} = {183}\,\mathrm{km}}$

Error