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How many seconds make one hour? How many minutes make one day?

Important Questions on Earth and Sky

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Environmental Studies>Our Universe>Earth and Sky>Time and Space
The nearest star to our solar system is 4.3 light years away. The distance of this star in Parsec is (Mean distance between the earth and the sun =1.5×1011 m and one light year =9.46×1015 m
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
A train leaves station A at 8 am and reaches station B at 12 noon. A car leaves station B at 8:30 am and reaches station A at the same time when the train reaches station B. At what time do they meet?
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
The angular diameter of a planet measured from earth is 90". If the diameter of the planet is π×106 m, then its distance from the earth is
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Environmental Studies>Our Universe>Earth and Sky>Time and Space

The temperature of an object is 60°C. Its value in Fahrenheit scale is

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Environmental Studies>Our Universe>Earth and Sky>Time and Space
A boy increases his speed to 95 times of his original speed. By this he reaches his school 30 minutes before the usual time. How much time he takes usually?
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Environmental Studies>Our Universe>Earth and Sky>Time and Space

Convert -40°F into Celsius.

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Environmental Studies>Our Universe>Earth and Sky>Time and Space
Walking at 45th of his usual speed, a man is 12 minutes late for his office. What is the usual time taken by him to cover that distance?
HARD
Environmental Studies>Our Universe>Earth and Sky>Time and Space
A man is walking at a speed of 12 km/hour. After every kilometer he takes rest for 4 minutes. How much time (in minutes) will he take to cover a distance of 8 kilometers ?
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
A takes 2 hours 30 minutes more than B to walk 40 km. If A doubles his speed, then he can make it in 1 hour less than B. How much time (in hours) does A require for walking a 40 km distance?
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
If Shivan walks at the rate of 19 kmph. How much time (in min) will he take to cover 665 m?
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
Walking at 60% of his usual speed, a man reaches his destination 1 hour 40 minutes late. His usual time (in hours) to reach the destination is:
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
A and B are at a distance of 1.7 km apart and they start running towards each other at a speed of 8 m/s and 9 m/s respectively. After how much time, will they meet each other?
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
Which of the following is not a unit of time?
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
In earlier days, movement of the moon was used to calculate the time of the day.
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
Universal time is based on
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
We use a clock to measure the accurate time interval of a sports event.
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
Why do we need to measure time? Name the types of devices used to measure time from ancient times to present time. Which one of them gives the most accurate time? 
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Environmental Studies>Our Universe>Earth and Sky>Time and Space

Name the principle on which the following instruments work: Sundial

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Environmental Studies>Our Universe>Earth and Sky>Time and Space
A man travels on a scooter from A to B at a speed of 30 km/h and returns back from B to A at 20 km/h. The total journey was performed by him in 10 hr. Find the distance from A to B.
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Environmental Studies>Our Universe>Earth and Sky>Time and Space
How do we measure the time?