Question

24. Ramesh got 5 marks more than Sonu in a test. If the total marks secured by
15. How many marks did Ramesh got?
a 25
b) 5
c) 15
d) 10
25. Given 1/u+1/v = 1/f. Find the value of v, if f=20. u=30
a) -20
b)-60
c) 60
d) -30​

Answer 1

Answer:

C 15 i.e., Ramesh got 15 marks in the examination

Answer 2

Given; Ramesh got 5 marks more than Sonu in a test. ,1/u+1/v = 1/f.

To Find; The solution

Solution; Let the marks scored by sonu as x , then ramesh scored marks as x+5

(II)  1/u+1/v = 1/f.

f=20, u= 30

1/v= u-f/uf= 10/600= 1/60

Hence the value of v is 60

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