Physics, asked by MANISH9024, 7 months ago

a person moves for 200km with 50 kmph next 300 km with 90 kmph and the next 150km with 100kmph speed. find the average speed of the whole journey

Answers

Answered by amandeep480
1

Answer:

2.70 m/s

Explanation:

a = total d/total time

200+300+150/100+90+50

650/240

= 2.70m/s

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Answered by Anonymous
8

\bf{\gray{\underbrace{\blue{Given:–}}}}

The person moves for 200 km with 50 kmph next 300 km with 90 kmph and the next 150 km with 100 kmph speed.

\bf{\gray{\underbrace{\blue{To\:find:–}}}}

The average speed of the whole journey = ?

\bf{\underbrace{\blue{Solution:–}}}

Time for first part :-

t₁ = 200/50 hr = 4 hr

Time for second part :-

t₂ = 300/90 hr = 3.3 hr

Time for third part :-

t₃ = 150/100 hr = 1.5 hr

\boxed{\bf{\red{Average\:speed=\frac{Total\:distance}{Total\:time}}}}

.°. Average\:speed=\frac{s₁+s₂+s₃}{t₁+t₂+t₃}

Average\:speed=\frac{200+300+150}{4+3.3+1.5}

Average\:speed=\frac{650}{8.8}\:km/hr

\boxed{\bf{\purple{Average\:speed=73.864\:km/hr(approximately)}}}

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