Question

19. The ratio of 3 weeks to 3 days is :

(1) 1 : 7 (2) 7 : 1 (3) 1 : 1 (4) 2 : 2

20. The mean proportion between 9 and 25 is :

(1) 15 (2) 25 (3) 30 (4) 225
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Answer 1

Answer:

ans no.1 (1) 1:7

ans no. 2 d 225

Answer 2

Answer:

Explanation:

19. 3 weeks is 21 days

     So, 21 /3

     7:1

20. Let x be the mean proportional between 9 and 25.

     ⇒ x² = 9 x 25

     ⇒ x² = 225

     ⇒ x = √225

     ⇒ x = 15