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Compound Variation

Revanti reach...

Question

Revanti reached her grandparents place at 9.20 a.m. after travelling in a train 9 hours and 37 minutes. What time did her train start from the station?

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Solution

Revanti reached at $9 : 20$ am
Travelling time $= 9$ hours $37$ minutes
From $9 : 20$ am to $12 : 20$ am
$= 9$ hours
Now $20$ minutes $= 12 : 00$ am
Remaining minutes $= 37 - 20 = 17$ min
$∴ 12 : 00$ am
$- 17$ minutes
$= 11 : 43$ pm
$∴$ At $11 : 43$ pm train started from the starting point.

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