Question

find the ratio of the following :

30 minutes to 1.5 hours and 40 cm to 1.5 mfind the ratio of the following a 30 minute to 1.5 hours b42 1.5 m m c 55 paise to rupees 1D 500ml to two letters ​

Answer 1

Answer:

(a) 30 minutes to 1.5 hours

60 minutes = 1 hour

Hence, 30 minutes = 0.5 hour

Hence, 30 minutes to 1.5 hours = 0.5 / 1.5

Here, HCF of 0.5 and 1.5 is 0.5

= (0.5 ×1) / (0.5 × 3)

= 1 / 3

Therefore, the ratio of 30 minutes to 1.5 hours is 1 : 3.

(b) 40 cm to 1.5 m

100 cm = 1m

40 cm = 0.4 m,

Hence, 40 cm to 1.5 m = 0.4 / 1.5

= 4 / 15

Therefore, the ratio of 40 cm to 1.5 m is 4 : 15

(c) 55 paise to ₹ 1

₹1 = 100 paise

Hence, 55 paise to ₹ 1 = 55 / 100

Here, HCF of 55 and 100 is 5

= (5 × 11) / ( 5 × 20)

= 11 / 20

Therefore, the ratio of 55 paise to ₹ 1 is 11 : 20

(d) 500 mL to 2 litres

1000 ml = 1 l

500 ml = 0.5 l

Hence, 500 ml to 2 litres = 0.5 / 2

Here, HCF of 0.5 and 2 is 0.5

= (0.5 × 1) / ( 4 × 0.5)

= 1 / 4

Therefore, the ratio of 500 ml to 2 litres is 1 : 4