(a) 15,45,40,120
Since
Therefore 15, 45, 40, 120 are in proportion.
(b) 33,121,9,96
Since
Therefore, 33, 121, 9, 96 are not in proportion.
(c) 24,28,36,48
Since
Therefore 24, 28, 36, 48 are not in proportion.
(d) 32,48,70,210
Since
Therefore 32, 48, 70, 210 are not in proportion.
(e) 4,6,8,12
Since
Therefore 4, 6, 8, 12 are in proportion.
(f) 33,44,75,100
Since
Therefore 33, 44, 75, 100 are in ratio.
Determine if the following ratios form a proportion. Also, write the middle terms and extreme terms where the ratios form a proportion.
(a) 25 cm : 1 m and Rs 40 : Rs 160
(b)39 litres : 65 litres and 6 bottles : 10 bottles
(c) 2 kg : 80 kg and 25 g : 625 g
(d) 200 mL : 2.5 litre and Rs 4 : Rs 50
Complete the drawing shown in Fig. 9.14 to indicate where the free ends of the two wires should be joined to make the bulb glow