A train travels the first 15 km at a uniform speed of 30 kmh 1, the ne

1.	A train travels the first 15 km at a uniform speed of 30 kmh 1, the next 75 km at auniform speed of 50 kmh 1, and the last 10 km at a uniform speed of 20 kmh 1.
Answer» Given, d 1 =15km,V 1 =30km/h d 2 =75KM,v 2 =50km/h d 3 =10km,v 3 =20km/h we know that, average SPEED =total distance covered/total time taken total distance covered =D=15+75+10=100km total time taken =T=(15/30)+(75/50)+(10/20)=2.5hours so, average speed =100/2.5=40km/h

A train travels the first 15 km at a uniform speed of 30 kmh 1, the next 75 km at auniform speed of 50 kmh 1, and the last 10 km at a uniform speed of 20 kmh 1.

Answer»

Given,

=15km,V

=30km/h

=75KM,v

=50km/h

=10km,v

=20km/h

we know that,

average SPEED =total distance covered/total time taken

total distance covered =D=15+75+10=100km

total time taken =T=(15/30)+(75/50)+(10/20)=2.5hours

so, average speed =100/2.5=40km/h

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A train travels the first 15 km at a uniform speed of 30 kmh 1, the next 75 km at auniform speed of 50 kmh 1, and the last 10 km at a uniform speed of 20 kmh 1.​

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A train travels the first 15 km at a uniform speed of 30 kmh 1, the next 75 km at auniform speed of 50 kmh 1, and the last 10 km at a uniform speed of 20 kmh 1.