A bicycle wheel of a diameter of 70cm is turning at 5 revolutions per second, find the speed of the on the rim of the wheel, giving your ans

Question

A bicycle wheel of a diameter of 70cm is turning at 5 revolutions per second, find the speed of the on the rim of the wheel, giving your answer in km/h

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Reagan 1 month 2021-08-14T01:53:25+00:00 1 Answer 0 views 0

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    2021-08-14T01:55:13+00:00

    Answer:

     \huge \underline \bold \red{Correct  \: Question :}

    • A bicycle wheel, diameter 70 cm,is making 25 revolution in 10 sec.At what speed in km|/h is the bicycle traveling.

     \huge \underline \bold \red{Solution :}

     \sf \: We \:  know  \: that, \\  \sf⟹ Circumference = 2πr \\ \sf→ Circumference = 2 \times \frac{22}{7} \times  35 \\ \sf→ Circumference = 44  \times  5 \\ \sf→ Circumference = 220 \\

    ∴ Distance travelled in one revolution = 220 cm

    Distance travelled in 25 revolutions = 25 * 220 = 5500 cm

     \sf⟹ Speed =  \frac{Distance}{Time}  \\ \sf→ Speed =  \frac{5500}{10}   \times 100 m/s \\ \sf→ Speed = 5.50 m/s \\ \sf \: Now, In  \: km/h \\ \sf→ Speed = 5.50  \times 36 \\ \sf→ Speed = 19.8 km/h \\

     \bold \purple{  \bf \: Speed = 19.8 km/h}

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