A train covers half of the journey with a speed of 30m/per second and

1.	A train covers half of the journey with a speed of 30m/per second and other half with speed of 40m/per second . Calculate average speed of the entire journey
Answer» Answer: Given: A train covers HALF of the journey with a speed of 30m/per second and other half with speed of 40m/per second. Find: Calculate average speed of the entire journey. Know TERMS: DISTANCE = S. Time taken (1) = $\bold{t_{1}}$ Time taken (2) = $\bold{t_{2}}$ Calculations: $\longrightarrow\bold{s = t1+t2}$ $\longrightarrow\bold{s \times (\dfrac{1}{60} + \dfrac{1}{80})}$ USING formula: $\longrightarrow\bold{\dfrac{s}{t1+t2}}$ Calculations: $\longrightarrow\bold{\dfrac{240}{7}}$ $\longrightarrow{\sf{\underline{\boxed{\red{\sf{34.28 \: m/s}}}}}}$