Passage

Directions: The data below provides information about two cars, P and Q, travelling from city M to city N at the same speed. Read the data carefully and answer the following question. Car P: Car P departs from city M and, after travelling 80 km, reduces its speed by 20%. The car reaches city N at 2:00 P.M. Car Q: Car Q departs from city M at the same time as Car P and, after travelling 425 km, reduces its speed by 40%. The car reaches city N at 1:30 P.M. If both cars travelled with their original speeds, then they will reached city N at 12:00 P.M.

If the speed of car R is 16 2 3 % more than the original speed of car P, then find the time taken by car R to cover the distance between city M and city N.