Can anyone please solve this java exercises for me
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Answers
Solutions :-
23.
Let the radius of a circle be 7 cm
We know that
Circumference of a circle = 2πr units
The Circumference of the circle
=> C = 2×(22/7)×7 cm
=> C = 2×22 cm
=> C = 44 cm
The Circumference of the circle = 44 cm
We know that
Area of a circle = πr² sq.units
Area of the given circle
=> A = (22/7)×7² cm²
=> A = (22/7)×7×7 cm²
=> A = 22× 7 cm²
=> A = 154 cm²
Area of the circle = 154 cm²
24.
The distance travelled by a horse in one hour = 32 km
The distance travelled by a horse in 60 minutes
= 32 km
The distance travelled by a horse in one minute
= 32/60
= 8/15 km
The distance travelled by a horse in 20 minutes
= 20×(8/15)
= (20×8)/15
= 160/15
= 32/3 km
= 10 2/3 km
= 10.66 km
The distance covered by the horse in 20 minutes is 32/3 km or 10 2/3 km or 10.66 km
25.
Given that
C/5 = (F-32)/9
Given that C = 37°C
Now,
37/5 = (F-32)/9
=> (37×9)/5 = F-32
=> 333/5 = F-32
=> F = (333/5)+32
=> F = (333+160)/5
=> F = 493/5
=> F = 98.6°F
26.
Given that
F = 105°F
Given that C = 37°C
Now,
C/5 = (105-32)/9
=> C/5 = 73/9
=> C = (73×5)/9
=> C = 365/9
=> C = 40.55°C