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Important questions on Rounding Of Digits

HARD

The figure shows the position-time (x-t) graph of one-dimenstional motion of a body of mass . The magnitude of each impulse is

A

B

C

D

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HARD

The sides of a rectangle are and . Taking the significant figures into account, the area of the rectangle is

A

B

C

D

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HARD

With due regard to significant figures, add the following:
a. 953 and 0.324
b. 953 and 0.625
c. 953.0 and 0.324
d. 953.0 and 0.374

A

a. ; b. c. d.

B

a. ; b. c. d.

C

a. ; b. c. d.

D

a. ; b. c. d.

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HARD

The numbers 3.845 and 3.835 on rounding off to 3 significant figures will give then

A

3.85 and 3.84

B

3.84 and 3.83

C

3.85 and 3.83

D

3.84 and 3.84

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HARD

A physical quantity P is related to four observables a, b, c and d as follows :
P
The percentage errors of measurement in a, b, c and d are 1%, 3%, 4% and 2%, respectively. What is the percentage error in the quantity P ? If the value of P calculated using the above relation turns out to be 3.763, to what value should you round off the result ?

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HARD

The mass of a box measured by a grocer's balance is . two gold pieces of masses and are added to the box. The total mass of the box is:

A

B

C

D

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