You can jog at a constant speed of 6 km/h. If you can burn 1200 calories per 1800m, find how many calories you can burn jogging for 1.5 hours (find a composite function first).

Answer 1

1200 calories per 1800 minutes (not clear what "m" stands for though. if for minute then as follows)

= 1200 per 30 hours

1.5/x = 30/1200 = 1/40

x = 60 calories burned in 1 hour

90 calories burned in 1.5 hours

C = 60H where C= calories burned and H= hours jogging

1800=60(30)

60 =60(1)

90 =60(1.5)

6 km/hour

1800 calories burned per 180 km

10 calories per 1 km

15 calories per 1.5 km

C=10K where K = number of km's jogged, C=calories burned per km

C=10K =10(6H) = 60H

C(K) = C(C(H)) C(6H) = 10(6H) = 60H

But maybe "m" stands for meter

then 1200 calories burn for every 1800 meters = 18 km. 6km per hour means 1200 per 3 hours, and 400 per hour

1.5 hours burn 1.5(400) = 600 calories