Question

A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour.Its average speed in km/h is *​

Answer 1

$\mathfrak{\huge{\green{\underline{\underline{Answer :}}}}}$

Distance travelled in 1hr=60×1 = 60 km

Distance travelled in half hour= 40×1/2 =20 km

Total distance = 60+20=80 km And total time taken = 1hr 30 min

Average speed = total distance ÷ total time = 80÷3/2=80×2÷3 = 160÷3 = 53.34 km/ hr

Hope It Will Help.❤

Answer 2

Distance travelled in 1hr=60×1 = 60 km

Distance travelled in half hour= 40×$\huge\frac{1}{2}$=20 km

Total distance = 60+20=80km &

Total time taken = 1hr 30 min

Average speed =$\huge\frac{Total~distance}{Total~time}$

= 80÷3/2

=80×$\huge\frac{2}{3}$

= $\huge\frac{160}{3}$= 53.34 km/ hr