A) \[\frac{7}{15}\]
B) \[\frac{8}{15}\]
C) \[\frac{5}{4}\]
D) \[\frac{7}{16}\]
Correct Answer: B
Solution :
1 minute = 60 seconds \[1\frac{1}{4}\min =\frac{5}{4}\min =\frac{5}{4}\times 6\text{0 s}=\text{75 s}\] \[\therefore \] The required fraction \[=\frac{40}{75}=\frac{8}{15}\]
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