A BOAT COVER 32 KM UPSTREAM AND 36 KM DOWNSTREAM IN 7 HOURS .ALSO ,IT COVERS 40 KM UPSTREAM AND 48 KM DOWNSTREAM IN 9 HOURS .THE RATIO OF SPEED OF BOAT IN STILL WATER AND SPEED OF THE STREAM IS ?
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
frank
maths and life is same,because both contains lots of problems