If a plane travels at an average velocity of 900 km/hr, it is 531 km from Harlingen to Houston, and 7798 km from Houston to London, how long will it take to fly from Harlingen, TX to London, UK? (You can ignore the time spent in the airports, taking off, landing, etc.)

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

answer; equivalent to a one(1) horsepower motor;