How long does an object take to travel 10 km at 40 km/h? give your answer in
minutes.
Answers
Answer:
HOPE IT HELPFUL
Step-by-step explanation:
Speed of a body is the distance covered by the body in unit time.
Therefore Speed=
\dfrac{Distance}{Time} which implies:
Distance = Speed \times Time
Time = \dfrac{Distance}{Speed}
1. In order to find speed, if :
Distance is in metre (m) and time in second (s); then the speed is in metre per second (m/s)
Distance is in Km (Km) and time in hour (h); then the speed is in Kilometer per hour (Km/h)
2. In order to find the distance, if:
Speed is in metre per second (m/s); time must be in second .
Speed is in Kilometer per hour (Km/h);time must be in hour
3. In order to find time, if:
Speed is in Kilometer per hour (Km/h), distance must be in Kilometer.
Speed is in metre per second(m/s), distance must be in metre.
Unit of Speed
\because
Speed=\dfrac{Distance}{Time}
\therefore
unit \: of \: speed=\dfrac{unit \: of \: distance}{unit \: of \: time}
Now, the various units of distance are metre, centimetre, Kilometre etc. and the various units of time are hour, minutes and seconds.
So, say we take the unit of distance to be centimetre (cm.) and the unit of time to be second (s.).
Example: A snail covers a distance of 8 cm in 4 seconds.
So the speed of the snail is
\dfrac{distance \: covered}{time \: taken}=\dfrac{8 \: cm}{4 \: sec}=2 \: cm/s
So here,
unit \: of \: speed=\dfrac{cm}{sec}=cm/s
Answer:
may be it's helpful for you
thank you:)
