Science/maths

what are some problems you might encounter when
a)finding the volume of a rugby ball
b)finding the diameter of a tennis ball
c) finding the mass of a grain of sugar


can you help me then I help you please w/b

a) submerge it in water in a graduated container and find its volume by amount the water rises in the container. (law of displacement)

b) measure its circumfrence by wrapping a string around it and then measure the string. Next divide this measured length by pi (3.14)

c)Place it on a very accurate small metric scale
*there your help now you help me please...

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