Put y = 0, 3x â€“ 45 = 0 or x = 15 , so (15, 0)

Put x = 0, 5y â€“ 45= 0 ,or y = 9

Thus the line cut y â€“axis at (0,9)

Thus we can say OAB is the triangle T which is right angled triangle so AB will be dia of triangle.

Diameter AB = (9^2 + 15^2)^1/2 = (81+225)^1/2 = (306)^1/2 = 17.54 (approx)

So radius = 17.54/2 = 9 (approx)

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