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A car covers first 39 km of its journey in 45 minutes and remaining 25 km in 35 minutes. What is the average speed of car during the whole journey ?

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A car covers first 39 km of its journey in 45 minutes and remaining 25 km in 35 minutes. What is the average speed of car during the whole journey ?
1). 40 kmph
2). 64 kmph
3). 49 kmph
4). 48 kmph


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2 answers

0 vote
Answered by on | Votes 0 |
Solution

Average speed = $\frac{(39 + 25) km}{(45 + 35) min}$

= $\frac{64 km}{80 min}$

= $\frac{64 \times 60}{80}$ kmph

= $48$ kmph

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3 vote
Answered by on | Votes 3 |
Solution

Average speed = $\frac{(39 + 25) km}{(45 + 35) min}$

= $\frac{64 km}{80 min}$

= $\frac{64 \times 60}{80}$ kmph

= $48$ kmph




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