On a 60km State road up bus travel the first 30 kilometre with a unifo

1.	On a 60km State road up bus travel the first 30 kilometre with a uniform speed of 30 km h -1 how fast must the bus travel the next 30 km so as to have average speed of 40 km h -1 for the entry trip
Answer» Given: Total distance = 60 km Speed of bus of first 30KM = 30 km/h To find: Speed of bus of SECOND 30km where the AVERAGE speed becomes 40km/h Solution: Average speed = 40km/h Using the formula Average speed = 2V1V2/V1 + V2 Substituting V1 = 30 km/h V2 = ? → 40 = 2(30)(V2)/30 + V2 → 40/1 = 60V2/30 + V2 By Cross-multiplyng → 60V2 = 40(30 + V2) → 60V2 = 1200 + 40V2 → 60V2 - 40V2 = 1200 → 20V2 = 1200 → V2 = 1200/20 → V2 = 60 km/h Hence , the speed in second 30km where it's average speed becomes 40km/h = 60km/h.

On a 60km State road up bus travel the first 30 kilometre with a uniform speed of 30 km h -1 how fast must the bus travel the next 30 km so as to have average speed of 40 km h -1 for the entry trip

Answer»

Given:

Total distance = 60 km
Speed of bus of first 30KM = 30 km/h

To find:

Speed of bus of SECOND 30km where the AVERAGE speed becomes 40km/h

Solution:

Average speed = 40km/h

Using the formula

Average speed = 2V1V2/V1 + V2

Substituting

V1 = 30 km/h
V2 = ?

→ 40 = 2(30)(V2)/30 + V2

→ 40/1 = 60V2/30 + V2

By Cross-multiplyng

→ 60V2 = 40(30 + V2)

→ 60V2 = 1200 + 40V2

→ 60V2 - 40V2 = 1200

→ 20V2 = 1200

→ V2 = 1200/20

→ V2 = 60 km/h

Hence , the speed in second 30km where it's average speed becomes 40km/h = 60km/h.

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On a 60km State road up bus travel the first 30 kilometre with a uniform speed of 30 km h -1 how fast must the bus travel the next 30 km so as to have average speed of 40 km h -1 for the entry trip​

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On a 60km State road up bus travel the first 30 kilometre with a uniform speed of 30 km h -1 how fast must the bus travel the next 30 km so as to have average speed of 40 km h -1 for the entry trip