Question

The result of (2.01 x 4.06) cm² + 1.6 cm2 upto correct significant figures is

•9.8 cm2

•9.76 cm2

•9.7606 cm2

•10.0 cm2
​

Answer 1

Explanation:

(a)

0.007= 7×10

−3

Significant digit =7

Only one significant digit

(b) Number of significant digit =3

(c)

All non-zero numbers are always significant.All zeroes before a non zero number are insignificant. All zeroes which are simultaneously to the right of the decimal point and at the end of the number are significant. The only non significant digit here is the zero before the decimal point.

Hence, number of significant digits is 4.

(d)

All non-zero numbers are always significant. All zeroes which are simultaneously to the right of the decimal point and at the end of the number are significant.

Hence, number of significant digits is 4.

(e)

All the digits are significant. (no leading and trailing zero)

No. of significant digits =4

(f)

Significant digits =6032

No. of sig. digits =4