Question

An aeroplane travels distance of 2500 km 1200 km and 500 km at the rate of 500 km per hour respectively find the average speed

Answer 1

as average speed is delta displacement/delta time taken

so we have to find time spent first,

time spent = displacment/speed

so for first part of journey it's 5 hours for second 2.4 hours and last 1 hour

so total time = 8.4

now average speed is 4200km /8.4 which is 1000/2=500km/ hour