Question

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Ctrl + F11
Choice 2 of 4:Ctrl + Shift + F11
Choice 3 of 4:Ctrl + F10
Choice 4 of 4:Ctrl + Shift + F10​

Answer 1

To find a : b : c, b is made same in both the ratios. L.C.M of 4 and 5 is 20

a:b=

4

3

=

4×5

3×5

=

20

15

b:c=

9

5

=

9×4

5×4

=

36

20

∴ a:b:c=15:20