Question

3-√2,3+√2 both are irrational numbers prove that the sum of the numbers is rational​ number

Answer 1

Solution

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3+  

2

​

+3−  

2

​

 

=3+3=6 which is a rational number

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Answer 2

Answer:

A leather belt 9 mm × 250 mm is used to drive a cast iron pulley 90 cm in diameter at 336 r.p.m. If the

active arc on the smaller pulley is 120o

and the stress in the tight side is 2 Mpa, find the power capacity of

the belt, which weighs 1000 kg/m3

. Take µ=0.35.