TCS Company Numerical Ability Time Distance and Speed

One train travels 200m from A to B with 70 km/ph. and returns to A with 80kmph, what is the average of their speed?

Read Solution (Total 5)

the formula for this type of problem,i.e. average speed,
2*x*y/(x+y), where x and y are the up and down speed.
so ans for this prob is 2*70*80/(70+80)=74.666kmph
12 years agoHelpfull: Yes(37) No(0)

speed= dist/time
so avg speed=400/(200/70+200/80)
12 years agoHelpfull: Yes(3) No(4)
2(a*b)/(a+b)
12 years agoHelpfull: Yes(3) No(0)
2xy/x+y
2(70*80)/70+80
5600*2/150
12 years agoHelpfull: Yes(1) No(0)
75
because average = 70+80/2=75
10 Months agoHelpfull: Yes(0) No(0)

TCS Other Question

.An equation of the form 7x+17y+ 3z=54. Find the difference between x intercept and z intercept Two years before Paul’s age is 2times the Alice age and the present age of Paul is 6times the Alice. what is the presents Paul’s age???( 3years) “u try to solve this question once”