Question

where had Sergei met him day before yesterday ?​

Answer 1

Let mass of one kind of tea x kg be mixed with another kind of tea mass y kg

SP of x kg tea = Rs 80x

Loss = (CP - SP)/CP

0•2 CP = CP - 80x

0•8CP = 80x. Or CP = 100x

Similarly

Profit = (SP - CP)/CP

0•25CP = 200y - CP

1•25CP = 200y . Or CP = 20000y/125 =160y

Total CP of x and y kg of tea = 100x + 160y

SP of x and y kg of tea = (x + y )×150

Profit = (SP - CP)/CP

0•25 = {(x + y )150 - (100x + 160y)}/(100x +160y)

0•25(100x + 160y) = (50x - 10y)

25x + 40y = 50x - 10y

25x = 50y

x/y = 2/1

Answer 2

Answer:

Sadovya Street

How did Sergei come to remember that he had met the beggar before? Ans. The beggar's face looked familiar to Sergei. When he saw the beggar's overshoes, one of which was high and the other low, he suddenly remembered seeing him day before yesterday at Sadovya Street.