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1) the inches travelled by the point on 6inches radius record is 6^2*45
and another point 5 inches radius is 5^2*45
hence the first point travels more so its A
even I feel its A correct if wrong
2)total students=30
seniors=s=2j+3
juniors=j
none=(3/10)*30=9
s+j+9=30
3j+12=30
j=6
Hence C
Please correct first one if wrong I too feel A is the answer
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