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The bhagirathi and the Alaknanda merge a...

The bhagirathi and the Alaknanda merge at Deoprayag to form the Ganga with their speeds in the ratio `1 :1.5`. The cross-sectional areas of the Bhagirathi, the Alaknanda and the Ganga are in the ratio `1 : 2 :3`. Assuming stremline flow, the ratio of the speed of Ganga to that of the Alaknands is

A

`7:9`

B

`4:3`

C

`8:9`

D

`5:3`

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The correct Answer is:
C
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