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.
