if u r traveling from Mumbai to banglore and return back .To find the speed of the car which of the following r needed.

2 Answers on this Question

1. the answer is 5)c only.
   here is an example.
   let the avg speed are 20 and 40 accordingly and dist
   between them is x.
   so total time required (x/20+x/40).and the total dist
   covered is 2x.
   so avg speed is 2x/(x/40+x/20)=80/3.

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2. i think it is a and b

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