Question

Walking at the rate of 4 kmph a man covers certain distance in 2 hrs 45 min. Running at a speed of 16.5 kmph the man will cover the same distance in how many minutes ?

• A. 50 min
• B. 35 min
• C. 40 min
• D. 45 min.

Answer 1

Answer:

C. 40 min

When Speed = 4 kmph

Time = 2hr 45 min $= 2+\frac{45}{60}$

$=2+\frac{3}{4}$

$=\frac{11}{4}hrs$

Distance = Speed x time

$D=4\times{\frac{11}{4}}$

$=11km$

When Speed = 16.5 kmph

$Time=\frac{Distance}{Speed}$

$Time = \frac{11}{16.5}$

$=\frac{110}{165}\times{60}$

$=40min$