Question: walking at the rate of 3 kmph a man cover certain distance in 3 hr 20 min . running at a speed of 9 kmph the man will cover the same distance in .
A) 45 min
B) 50 min
C) 40 min
D) 48 min
E) 54 min
Correct answer: e
Grade: 6 | Topic: Ratios and proportions | Difficulty: Hard | Standard: 6.RP.A.3b