Question

True weight of a book is 1.20 kg. When this book
is measured with two different weighing scales A
and B then readings are found as 1.27 kg and
1.21 kg respectively. Then
(1) Scale A is more accurate than scale B
(2) Scale B is more accurate than scale A
(3) Scale A is less precise than scale B
(4) Both (2) and (3)​

Answer 1

Answer:

When this book is measured with two different weighing scales A. and B then readings are found as 1.27 kg and. 1.21 kg respectively.

Answer 2

Given info : True weight of a book is 1.20 kg. When this book is measured with two different weighing scales A and B then readings are found as 1.27 kg and 1.21 kg respectively.

To find : correct statement (s) ..

1. Scale A is more accurate than scale B
2. Scale B is more accurate than scale A
3. Scale A is less precise than scale B
4. both (2) and (3).

solution : first you should learn about precise and accuracy .

accuracy is how close a measured value to the true value while precise is how close different measured values to each other.

here measured value of A = 1.27 kg

and measured value of B = 1.21 kg

so scale A is less precise than scale B.

and scale B is more accurate than scale A.

Therefore correct option is (4)