a motorcycle wheel with diameter 42cm is making 60 revolutions in every 12 seconds.find the speed in km _1
Answers
Answered by
0
Answer:
Tamil karana iruinthutu ithu theriamairrukiye
Answered by
8
Answer
d = 42 cm
r = d÷2 = 42÷2 = 21cm
speed = distance ÷ time
distance = circumference × revolutions
distance = 2πr × 60 = 2 ×22÷7 ×21 ×60 = 7920cm = 79.2 m
time = 12 sec
speed = 79.2/12 = 6.6 m/s = 23.76 km /h
Similar questions