Question

Sarita and Sarika start walking from the some place in the opposite directions.if Sarika walks at a speed of 5/2 km/h and Sarita at a speed af 2km/h in how much time will they be 18 km apart?

Answer 1

relative speed =5/2 - 2,

=(5-4)/2,

=1/2 =0.5 km/hr,

then

time taken=distance/speed,

time taken =18/0.5,

=180/5,

=36 hr

Answer 2

THE SPEED OF SARIKA=5/2Km/h
THE SPEED OF SARITA=2km/h

Sarika determines the distance 5/2km in 1hr..
" " " " 1km. in 0.4 hr
" " " " 18km. in...._____ 18*0.4=7.2 hr...


Sarita determines the distance 2km in 1hr
" " " " 1km in 1/2=0.5hr
" " " " 18km In..,,,,, .,,.._ 18*0.5=9hr



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