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3 years ago

13

A 60-kg woman stands on the very end of a uniform board, which is supported one-quarter of the way from one end and is balanced.

What is the mass of the board?
a. 60 kg
b. 30 kg
c. 20 kg
d. 15 kg
e. 120 kg

1 answer:

Tasya [4]3 years ago

5 0

B 30 kg because

One quarter =1/2
Kg=60

1/2 of Kg
1/2*60
30 kg

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