alleryA and B cover the same road in 45 and 30 minutes. The ratio of their speeds is
A3 : 2
B4 : 9
C9 : 4
D2 : 3
Answer & Solution
Correct answer: D. 2 : 3
Speed varies inversely with time, so A : B = 30 : 45 = 2 : 3.
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