Question

please give me the answer of question number 13 14 15 16 17 18 19 20 21 22 23 24 25 wrong answer will be deducted on the spot and I want a good answer

Answer 1

13.radius 70cm and diameter 140 cm

Answer 2

16:take diameter 42cm
radius 21cm
pie 22/7
perimeter of the circle =2×pie×radius
2×22/7×21=44×3=132cm=perimeter
of the circle is doubled=132×2=264cm the perimeter of the new circle
264÷2=132cn the radius of the newcircle