Question

Calculate the value of the error (only) with one decimal place for: (21+1-14%) x (14 +1-9%) Please enter the answer without +- sign

Answer 1

Answer:

 6.9.

Explanation:

In case of product of two physical quantities with errors , the rule is that the product will contain error equal to the sum of percentage errors of the two physical quantities. Foe example  P contains 2% error and Q contains 3% error then P X Q will contain 2 +3 = 5 % error.

(21 ± 1.14 %) x (14±1.9%)

Total percentage error in the result of product

1.14 + 1.19 = 2.33 %.

Produce value = 21 x 14 = 294

percent of error in it = 2.33%

value of error

= 2.33% of 294

= 6.8502 or 6.9.