Marathon runner

Algebra Level 1

A marathon runner runs at a constant speed of 18 km/h for 2 hours and 20 minutes.

How far does he run?((In km)


The answer is 42.

Munem Shahriar by Munem Shahriar , 18, Bangladesh

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

2 solutions

Mohammad Khaza
Jul 1, 2017

we know that,

speed=distance/time

or, distance=speed x time 

                  =18 x (140/60)                              [60 minutes =1 hour]

                   =18 x 7/3=42 kph
2 Helpful 0 Interesting 0 Brilliant 0 Confused

. It should be distance/time instead of distance\time.

Munem Shahriar - 3 years, 9 months ago

Log in to reply

i have changed that.

Mohammad Khaza - 3 years, 9 months ago
Hana Wehbi
May 26, 2017

s p e e d = d i s t a n c e t i m e ⟹ 18 = d 2 1 3 speed = \frac{distance}{time} \implies 18= \frac{d}{2 \frac {1}{3}} because 2 2 hrs 20 20 mins= 2 1 3 2 \frac{1}{3} of an hour.

d = 42 d = 42 km.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...