Question

the total area of a circle and a square is equal to 5450 sq cm. the diameter of the circle is 70 cm. what is the sum of the circumference of the circle and the perimeter of the square?

Answer 1

513 is it correct??
just find area of circle then subtract it from 5450 and then find length of square by square rooting the value obtained and then just find perimeter and add it up!!!
HERE IT'S DONE!!!! :-)

Answer 2

Answer:

380 cm

Step-by-step explanation:

Area of a circle = pie × r²

r = 70/2 = 35 cm

Area of the circle = 22/7 × 35² = 3850 cm²

The area of the square = 5450 - 3850 = 1600 cm²

Area of the square = s²

S² = 1600

S = square root 1600

S = 40

The perimeter of the square = 40 × 4 = 160 cm

Circumference of the circle = 22/7 × 70 = 220 cm

The sum of the circumference of the circle and the perimeter of the square = 220 + 160 = 380 cm

= 380 cm