Answer:
(a) ` 5 to 50 paise = ` 5 : 50 paise \[=5\times 100\]paise: 50 paise = 500 paise: 50 paise = 10 : 1. (b) 15 kg to 210 g \[=\text{15 kg}:\text{21}0\text{ g}\] \[=\text{15}\times \text{1}000\text{g}:\text{21}0\text{g}\] \[=\text{15}000\text{ g}:\text{21}0\text{ g}=\text{5}00:\text{7}\]. (c) 9 m to 27 cm \[\text{= 9m : 27 cm}\] \[=\text{9}\times \text{1}00\text{ cm}:\text{27cm}\] \[=\text{900 cm}:\text{27cm}\] \[=\text{9}00:\text{27}=\text{1}00:\text{3}\]. (d) 30 days to 36 hours \[=\text{3}0\text{ days }:\text{ 36 hours}\] \[=\text{ 3}0\times \text{24 hours }:\text{ 36 hours}\] \[=\text{ 72}0\text{ hours }:\text{ 36 hours}\] \[=\text{72}0:\text{36}=\text{2}0:\text{1}\].
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