If the athlete covers 100m in 20seconds then her speed in km/h is __________.
(A) 19 km/h (B) 18 km/h
(C) 20 km/h (D) 5 km/h
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Question 1:
Which of these activities can be measured in hours?
(a) writing one page
(b) eating a sandwich
(c) a journey from Chennai to Mumbai
(d) watching a TV serial
ANSWER:
(c) A journey from Chennai to Mumbai
Writing a page and eating a sandwich need a smaller unit than hour. Watching a TV serial can be measured in hours, but the most appropriate option is the journey from Chennai to Mumbai.
Question 2:
The speed of a moving object means
(a) how far it goes.
(b) how long it goes on moving.
(c) how far it goes in a certain time.
(d) none of these.
ANSWER:
(c) how far it goes in a certain time
Speed is the rate at which an object covers a given distance in a particular period of time.
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