A cycle is 84 cm in diameter. how many revolution does it make in 1 km . if this wheel makes 28 revolution in 12 second. find speed of cycle in km/hr.
Answers
Answered by
52
the diameter is 84cm = 42 radius
circumference of a circle is = 22/7×42
= 22×6
= 132cm.
1 second revolution= 28/12 = 7/3.
so, 7/3× 132 = 302 cm or 0.302.
circumference of a circle is = 22/7×42
= 22×6
= 132cm.
1 second revolution= 28/12 = 7/3.
so, 7/3× 132 = 302 cm or 0.302.
Answered by
29
circumference circumference of wheel
= 2πr
=(2x22x42)÷7
=264 cm or 2.64 meter
Number of rotation in 1 kilometre
=1000÷2.64
=12500/33
Speed = (28x2.64)/12
=6.16 m/sec
=22.176 km/ hr
Hope it will help you
pls Mark as branliest
Similar questions