A) 40 cm
B) 45 cm
C) 50 cm
D) 30 cm
Correct Answer: A
Solution :
[a] \[{{X}_{cm}}=\frac{{{m}_{1}}{{x}_{1}}+{{m}_{2}}{{x}_{2}}+{{m}_{2}}{{x}_{3}}}{{{m}_{1}}+{{m}_{2}}+{{m}_{3}}}\] \[{{X}_{cm}}=\frac{300\times (0)+500(40)+400\times 70}{300+500+400}\] \[{{X}_{cm}}=\frac{500\times 40+400\times 70}{1200}=40\,cm\]You need to login to perform this action.
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