.1)A policeman buys some bunches of yellow bananas at 30 cents per bunch and red bananas 40 cents/bunch .He said if i have split the sum equally and bought bananas he would have got two more bunches find the amount he used it to buy bananasThere is a escalator and 2 persons move down it.A takes 50 steps and B takes 75 steps while the escalator is moving down.Given that the time taken by A to take 1 step is equal to time taken by B to take 3 steps.Find the no. of steps in the escalator while it is staionarycan i hav the procedure

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Guest

Jun 21st, 2006

let intial bunches of yellow ban be 3 , now +2 so total cost = 30 * 5 = 150also 3 (y) red banana bunches ( cost = 3 * 40 = 120 ) ;so ,total amount is 270,or in general (30x+60) + (40y)now divide by 2 should be a discrete value of 30 order , so, try different values to x and ylet x = 1 and y =1 , then we have90 + 40 = 130 130 / 2 = 65 ............... not possiblelet x = 5 and y = 2210 + 80 = 290290 / 2 = 145 ................ not possiblelet x = 6 and y = 3240 + 120 = 360360/2 = 180 AND 180 / 30 = 6 or 6 bunches of yellow bananas,therefore, he had 360 cents to buy bananas( also see that 360 degrees is onecycle, and when youdivide you by 30 you get 12 and when you divide by 40 you get 9, both are discrete values, and before this you dont have any other number, giving such discrete values )

sai mohan krishna

Jul 4th, 2006

the ans is 480 cents.it can be proved as followsfor each yellow banana he requires 30 centsand for each red banana 40 cents.hence the total amount taken by him to buy bananas must be the multiple of 30 and 40the possibilities are 120 , 240,360,480.................out of which 240 satisfies given condition.