Question

From a large ring of white colour of 15 cm diameter,3 small ringof3cm diameter each are painted black. Find the remaaining area of white colour.

Answer 1

Answer:

Ans. 1762.1 cm sq.

Step-by-step explanation:

diameter of large ring of white colour = 15cm

area of large ring of white colour = 22/7× 15/2×15/2

1769.6

diameter of 3 small ring of blackcolour = 3 cm

area of 3 small ring of black colour = 3×22/7×3/2×3/2

2.5

remaining area of white colour = 1769.6 - 2.5

1762.1 cm sq.