A scooter rider covers a distance of 30 meters in 5 seconds calculated speed in kilometer per hour
Answers
Answer:
(a) In order to calculate the speed in centimetres per second we should convert the given distance of 3 kilometres into centimetres and the given time of 5 minutes into seconds. Pleas note that 1 kilometre has 1000 metres and 1 metre has 100 centimetres. Now,
Distance travelled = 3 km
=3×1000=3×1000m
=3×1000×100=3×1000×100 cm ...(1)...(1)
= 300,000 cm
Time taken = 5 minutes
=5×60=5×60 seconds
=300s ...(2)...(2) ltBrgt We know that, Speed = Distance travelledTime takenDistance travelledTime taken
=300,000300s=300,000300s
= 1000 cm/s ...(3)...(3)
Thus, the speed of scooterist is 1000 centimetres per second.
(b) In order to express the speed in metres per second we should convert the given 3 kilometres into metres and the given time of 5 minutes into seconds. Thusk, in this case :
Distance travelled = 3km
=3×1000=3×1000 m
=3000=3000 m ...(4)...(4)
Time taken = 5 minutes
=5×60=5×60 seconds
= 300 s ...
Answer:
1.66km/h
Explanation:
Given,
Distance=30m
Time=seconds
Well known test.
To convert m/s into km/h it should be multiplied with 5/18
i.e,
30/5×5=18
=1.66km/h