Question

Find the area of the circles whose radii are given below.
(a) 21 m
(b) 32 mm
(c) 49 cm
(d) 63 m​

Answer 1

Answer:

a) 1386 m²

b) 3218.29 mm²

c) 7546 cm²

d) 12,474 m²

Step-by-step explanation:

a) πr² = 22/7 × 21 × 21 = 22×3×21 = 1386 m²

b) πr² = 22/7 × 32 × 32= 22528/7 = 3218.29 mm²

c) πr² = 22/7 × 49 × 49= 22 × 7 × 49 = 7546 cm²

d) πr² = 22/7 × 63 × 63= 22 × 9 × 63 = 12,474 m²

Hope it helps... Please mark as brainliest!!!