a family travelled for 12 hours . they covered the first half of the distance at 35 kmph and remaining half of the distance at 40 kmph . find the distance travelled by the family ?
let the distance travelled be x km . total time = ( x / 2 ) / 35 + ( x / 2 ) / 40 = 12 = > x / 70 + x / 80 = 12 = > ( 8 x + 7 x ) / 560 = 12 = > x = 560 km answer : e
divide(multiply(multiply(35, const_2), multiply(40, const_2)), subtract(multiply(multiply(40, const_2), const_1), multiply(multiply(35, const_2), const_1)))