Question

A bucket is lowered in to the well by the means of the rope and a fixed pulley. A a bucket
filled with the water is raised to a height of 22m by this system. Find the diameter of the
pulley if it's makes 25 revolutions during the ascent.

Answer 1

Answer:

Step-by-step explanation:

Diameter =77 cm

Radius =  

2

D

​

=  

2

77

​

cm =  

200

77

​

m

Speed =1.1 m/s

Time =1 min 28 sec=88 sec

Distance can be completed as S×T=1.1×88=96.8 m

Circumference ⇒2×π×r=2×  

7

22

​

×  

200

77

​

=2.42 m

∴  No. of Revolution =  

Circumference

Distance

​

=  

2.42

96.8

​

=40

∴  No. of revolution ⇒ 40

hope this helps you my smart boy study well

Answer 2

Answer:

25+22-25×22÷25+22.

Answer is 47.

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