Question

During first 18min of a 60min trip. a car has an
avarage speed of 11 m/sec. What should be the
avarage speed for remaining 42min so that car
is having avarage speed of 21ms for entire trip?
(1) 25.3m/sec (2) 29.2m/sec
(3) 31m/sec
(4) 35.6m/sec​

Answer 1

Answer:

i think answer is 25.3m/s