Answer:
1. we, have 1cm=10mm
so, ratio of 1mm to 1cm=10/1=10;1
thus, option ( B)is correct
2. 3x+5y=9
and 5x3y=7
now, adding the two
3x+5y+5x+3y=9+7
or, 8x+8y=16
or, 8(x+y) =16
or x+y=16/8=2
thus, option (A)is correct
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Answers & Comments
Answer:
1. we, have 1cm=10mm
so, ratio of 1mm to 1cm=10/1=10;1
thus, option ( B)is correct
2. 3x+5y=9
and 5x3y=7
now, adding the two
3x+5y+5x+3y=9+7
or, 8x+8y=16
or, 8(x+y) =16
or x+y=16/8=2
thus, option (A)is correct