Question

$(3 \times 3 {}^{5x} ) \: \div 9 {}^{2x}$
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Answer 1

Step-by-step explanation:

1 hour = 60 mins

4 hours = 4 x 60 mins

= 240 mins

Ratio :

= 40 mins : 4 hrs

= 40 mins : 240 mins

= 4 : 24

= 1 : 6

Therefore, the required ratio is 1:6.