TCS Company Numerical Ability Time Distance and Speed

A person do rock climbing at an altitude of 800 m.He go up by 7 mph. and come down by 9 mph. what was his av speed.

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can be solved by using
2XY/(X+Y) = (2*7*9)/(7+9)
= 126/16 = 7.875
Hence 7.875 is the ANSWER
13 years agoHelpfull: Yes(29) No(2)

for avg speed universal formula = 2xy/(x+y)
13 years agoHelpfull: Yes(10) No(3)
2*7*9/(7+9)=7.875
13 years agoHelpfull: Yes(8) No(2)
2*7*9/(7+9)=7.875
8 years agoHelpfull: Yes(1) No(0)

TCS Other Question

Now pet's age is to times when paul was once. But at that time paul's age=pet's current age ,how old is pet? there are a dozen eggs in a basket.which of the option can't be possible for the ratio of broken eggs to unbroken eggs...?

OPTIONS:
(a)1:4
(b)1:3
(c)1:5
(d)1:1