Question

The distance between two towns is 600km,correct to the nearest 10km

A car takes 8 hours 40minute, correct to the nearest 10 minute, to travel this distance

Calculate the lower bound for the average speed of the car in km/h

Answer 1

Below

Explanation:

rate X time = distance

rate = distance / time <=====we want minimum of this so make denominator as large as possible and numerator as small as possible

distance = 595 KM ( rounds up to 600 km)

time = 8 hr 44 min rounds down to 8 :40 you could make it 8:44.99)

595 km / (8 + 44.99/60) hr = 68 km/hr