Cinderella is having problem in estimation at what time to leave the ballroom as their no fairy godmother now. The ball starts at 8 pm and ends at 12 at night .If she runs at a speed of 5 km/h and her home is 1 km ahead .also she takes 20 minutes to change her dress at what time should she leave the ball room so her stepsisters don't realize she was also in the ball.
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Leave time
= 12:00 – 60/5 – 20
= 12:00 – 32 minutes
= 11:28 pm