Question

Walking at the rate of 4km/hr a man covers certain distance in 2hr 45min. If he runs at a speed of 16.5km/hr,How much time will he take to cover the same distance?

• A. 20min
• B. 60min

Answer 1

Given,

when speed = 4km/hr,time = 2hr 45min$=\frac{11}{4}hr$

$Distance=speed\times time$

$=4\times \frac{11}{4}=11km.$

New speed = 16.5km/hr

$time=\frac{distance}{speed}=\frac{11}{16.5}=0.66hr$

$0.66\times 60=40min$