Find the ratio of: (a) ₹5 to 50 paise (b) 15 kg to 210 g (c) 9 m to 27 cm (d) 30 days to 36 hours

To find ratios, both quantities should be in same unit.
(a) ₹5 to 50 paise
⇒ 5 x 100 paise to 50 paise [ ∵ ₹ 1 = 100 paise]
⇒ 500 paise to 50 paise
Thus, the ratio is = 500/50 = 10/1 = 10:1

(b) 15 kg to 210 g
⇒ 15 x 1000 g to 210 g [ ∵ 1 kg = 1000 g]
⇒ 15000 g to 210 g
Thus, the ratio is = 15000/210 = 500 : 7

(c) 9 m to 27 cm
⇒ 9 x 100 cm to 27 cm [ 1 m = 100 cm]
⇒ 900 cm to 27 cm
Thus, the ratio is = 900/27 = 100/3 = 100 : 3

(d) 30 days to 36 hours
⇒ 30 x 24 hours to 36 hours [ ∵ 1 day = 24 hours]
⇒ 720 hours to 36 hours
Thus, the ratio is = 720/36 = 20/1 = 20 : 1

Class 7 Maths Chapter 8 Exercise 8.1

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