Question

temperature at 12 o'clock afternoon in a village is 20 degrees celsius from 12 noon to 4 P.M temperature increased 3 degree Celsius per hour from, 4 P.M to 8 p.m temperature in decreased 2 degrees celsius per hour so find(1) temperature at 6 p.m (2) temperature at 8 p.m?

Answer 1

let the temperature at 12 be x
the temperature at any instant between 12 -4=x+3y,y is temperature between 12-4
temperature between any instant between any 4-8=(x+3y)+2(z-4),z is temperature between 4-8
ans=======
1). at 6 pm
x =20(given)
y=4(as the the hours between 12-4)
z=6(given)
ans= (20+3×4)+2×(6-4)=36
2)
x=20
y=4
z=8
ans=(20+3×4)+2×(8-4)=40
hence answered!