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The odometer of a car reads 2000 {~km} at the start of a trip

Science

Class 9

NCERT

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An object travels

16 m

4 s

and then another

16 m

2 s

. What is the average speed of the object?

The odometer of a car reads

2000 km

at the start of a trip and

2400 km

at the end of the trip. If the trip took

8 h

, calculate the average speed of the car in

km h^{- 1}

and

ms^{- 1}

Usha swims in a

90 m

long pool. She covers

180 m

in one minute by swimming from one end to the other and back along the same straight path. Find the average speed and average velocity of Usha.

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Question

Hard

Solving time: 4 mins

The odometer of a car reads $2000 km$ at the start of a trip and $2400 km$ at the end of the trip. If the trip took $8 h$ , calculate the average speed of the car in $km h^{- 1}$ and $ms^{- 1}$ .

Views: 6,232 students

Updated on: May 16, 2023

Book:

Science (NCERT)

Found 8 tutors discussing this question

Chloe Discussed

The odometer of a car reads

2000 km

at the start of a trip and

2400 km

at the end of the trip. If the trip took

8 h

, calculate the average speed of the car in

km h^{- 1}

and

ms^{- 1}

6 mins ago

Discuss this question LIVE

6 mins ago

Text solutionVerified

Distance covered by the car,

s = 2400 km - 2000 km = 400 km

Time elapsed,

t = 8 h

Average speed of the car is,

v_{a v} = \frac{s}{t} = \frac{400 km}{8 h}

= 50 km h^{- 1}

= 50 \frac{km}{h} \times \frac{1000 m}{1 km} \times \frac{1 h}{3600 s}

= 13.9 m s^{- 1}

The average speed of the car is

50 km h^{- 1}

13.9 m s^{- 1}

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Practice more questions from Science (NCERT)

An object travels

16 m

4 s

and then another

16 m

2 s

. What is the average speed of the object?

The odometer of a car reads

2000 km

at the start of a trip and

2400 km

at the end of the trip. If the trip took

8 h

, calculate the average speed of the car in

km h^{- 1}

and

ms^{- 1}

Usha swims in a

90 m

long pool. She covers

180 m

in one minute by swimming from one end to the other and back along the same straight path. Find the average speed and average velocity of Usha.

View all

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Question Text	The odometer of a car reads $2000 km$ at the start of a trip and $2400 km$ at the end of the trip. If the trip took $8 h$ , calculate the average speed of the car in $km h^{- 1}$ and $ms^{- 1}$ .
Updated On	May 16, 2023
Topic	Motion
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 46
Upvotes	4900
Avg. Video Duration	5 min

The odometer of a car reads $2000 km$ at the start of a trip and $2400 km$ at the end of the trip. If the trip took $8 h$ , calculate the average speed of the car in $km h^{- 1}$ and $ms^{- 1}$ .

Text solutionVerified

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The odometer of a car reads 2000 km at the start of a trip and 2400 km at the end of the trip. If the trip took 8 h, calculate the average speed of the car in kmh−1 and ms−1.

Text solutionVerified

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The odometer of a car reads $2000 km$ at the start of a trip and $2400 km$ at the end of the trip. If the trip took $8 h$ , calculate the average speed of the car in $km h^{- 1}$ and $ms^{- 1}$ .