Gate Exam Category

A man starts from B to K, another from K to B at the same time. after passing each other they complete their journey in 3.33 and 4.80 hours resp. Find the speed of the second man, if the speed of the first man is 12 km/h

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Gate Other Question
if n be a positive even integer,then the last two digits of the number (8)^2n-(6)^2n How many kgs of wheat costing Rs.24/- per kg must be mixed with 30 kgs of wheat costing Rs.18.40/- per kg so that 15% profit can be obtained by selling the mixture at Rs.23/- per kg?