A gear has the driving wheel of radius $2 c m$ and driven wheel of radius $20 c m .$
If the driven wheel has $40$ teeth, find the number of teeth in the driving wheel.

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Solution

The radius of driving wheel $r_{A} = 2 c m$
The radius of driven wheel $r_{B} = 20 c m$
Number of teeth in driven wheel $n b = 40.$
Number of teeth in driven wheel $n a = \frac{r a}{r b} \times n b$
$\Rightarrow \frac{2}{20} \times 40 = 4.$

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A gear has the driving wheel of radius 2cm and driven wheel of radius 20cm.If the driven wheel has 40 teeth, find the number of teeth in the driving wheel.

The radius of driving wheel rA=2cmThe radius of driven wheel rB=20cmNumber of teeth in driven wheel nb=40.Number of teeth in driven wheel na=rarb×nb⇒220×40=4.

A gear has the driving wheel of radius $2 c m$ and driven wheel of radius $20 c m .$
If the driven wheel has $40$ teeth, find the number of teeth in the driving wheel.

The radius of driving wheel $r_{A} = 2 c m$
The radius of driven wheel $r_{B} = 20 c m$
Number of teeth in driven wheel $n b = 40.$
Number of teeth in driven wheel $n a = \frac{r a}{r b} \times n b$
$\Rightarrow \frac{2}{20} \times 40 = 4.$