Question

11 The diameter of driver and driven pulleys are
100 mm and 200 mm respectively. If R.P.M
of driver pulley is 300, find out the speed of
driven pulley.


​

Answer 1

Step-by-step explanation:

given: d1 = 100 mm , d2 = 200 mm, n1 = 300 rpm

n2 = ?

n1 d1 = n2 d2

=> 300 × 100 = 200 × n2

=> n2 = [300 × 100] / 200

=> n2 = 150 rpm

Answer 2

Given,

The diameter of the driver$\[ = 100\,{\rm{mm}}\]$

The RPM of the driver pulley$\[ = 300\]$

The diameter of the driver$\[ = 200\,{\rm{mm}}\]$

Solution,

Assume that the speed of the driven pulley is $\[x\]$ rpm.

Therefore,

$\[\begin{array}{l} \Rightarrow 300 \times 100 = 200 \times x\\ \Rightarrow x = \frac{{300 \times 100}}{{200}}\\ \Rightarrow x = 150\end{array}\]$

Hence, the speed of the driven pulley is $\[150\]$ RPM.