Question

50.0 lb = how many kg

Answer 1

The correct answer is: " 22. 7 kg " .

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→ 50.0 lb = " 22. 7 kg " .

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Step-by-step explanation:

To solve:

Given: " 50.0 lb. " {that is; " 50 pounds " } ;

→ Convert this value to units of "kg" (kilograms) .

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Note the exact conversion: " 1 kg = 2.2 lbs. " .

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So:

→ 50.0 lb. * (
`(1 kg)/(2.2 lb)`) = __?__ kg ? ;

→ The units of: " lb." cancel out (to " 1 " ) ;

→ {since: "(
`(lb.)/(lb.)`) = 1 " } ;

→ to get: "(
`(50.0)/(2.2)`)" kg ;

→ Note that the "2.2" value is an "exact figure" ;

→ So we consider the number of significant figures in the value —

→ " 50.0 " — which has " 3 (three)" significant figures.

→ "(
`(50)/(2.2)`)" kg ;

= " (50 ÷ 2.2) " kg ;

= 22.727272.... kg ;

→ Round to "3 (three)" significant figures :

= " 22. 7 kg .

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The answer is: " 22. 7 kg " .

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→ 50.0 lb = " 22. 7 kg " .

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