Question

Ketan goes to librery for read everay day .he go 3 km per hour then he reached 8 min. Late but when he go 4km per hour then he reach 4min. First what is the distance between the to library to the home

Answer 1

let the distance be X

now; time taken while going with 3kmph time X/3

at 4kmph = X/4

then; X/3-8/60 = X/4 +4/60

      X/3-X/4 = 4/60+8/60

    THEN X WILL BE 12/5......