The ratio of speeds of A:B is 1:4. If B covers a distance in 20 min, A will cover it inA)77 minutesB)67 minutesC)70 mimutesD)None of these.
Question
The ratio of speeds of A:B is 1:4. If B covers a distance in 20 min, A will cover it inA)77 minutesB)67 minutesC)70 mimutesD)None of these.
Solution
The ratio of speeds of A and B is given as 1:4. This means that B is 4 times faster than A.
If B covers a certain distance in 20 minutes, A, being 4 times slower, will cover the same distance in 20 minutes x 4 = 80 minutes.
So, the correct answer is D) None of these.
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