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The sum of focal radii of the curve 90x^...

The sum of focal radii of the curve `90x^(2) + 25y^(2) = 225` is

A

5

B

10

C

6

D

3

Text Solution

Verified by Experts

The correct Answer is:
B
Given curve is `9x^(2) + 25y^2 = 225`
`implies (x^(2))/(25) + (y^(2))/(9) = 1`
Here , a = 5 , b = 3
`therefore` Sum of focal radii = 2 a = 10
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