A telephone will cost rs.13 for 19 min.what is the cost in rs.15 min 50 sec? ( rounded to one decimal)
Answers
Answer:
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}
Step-by-step explanation:
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If it costs ₹13 for 19 min (1140 secs) then for 1 sec it will cost 19/13.
Now, for 50 seconds it will cost 19/13×50 = 950/13 = 73.07 or 73.0