Question

Please I need the asnwers with explanation as soon as possible​

Answer 1

1)
a)6cm:5mm
60mm:5mm
12mm:1mm
b)12sec:1min
12:60
1:5
c) not sure
2) not sure
3)m:w:c
8:5:7=20
104:65:91=260
a)104
b)65
c)91
4)
a)4/9
b)4:5=9
20:25 =45
20 boys