80. |
In this question, different alphabets stand for various symbols as indicated below:
A" B means 'add B to A' |
A'B means 'subtract B from A' |
A @ B means 'divide A by B' |
A * B means 'multiply A by B' |
The time taken by two running trains in crossing each other is calculated by dividing the sum of the lenghts of two trains by the total
speed of the two trains. If the length of the first train is L1, the length of the second
train is L2; the speed of the first train is V1 and the speed of the second train is V2, which of the
following expressions would represent the time taken?
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