Question

people of brainly I urgently need ur help and quick pls if u know some answers answer that only NP but pls be quick class 8th ncert direct and inverse proportion​

Answer 1

=15 student strength

=The quantities may be of different units

I hope it may help you

Answer 2

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Answer:

The correct options are

8=>(b)

9=>(b)

Step-by-step explanation:

ANSWER 8=>(b) 15

We know that the total strength of class=2x+3x

where 2x=no. of girls and 3x =no. of boys

therefore by hit and trial method,

we will put x=1,2,3,4,5,6,.....  till we get the correct option

PUT x=1

2(1)+3(1)=2+3=5  which is not in options

PUT x=2

2(2)+3(2)=10  which is also not in options

PUT x=3

2(3)+3(3)=6+9=15 which  is option (b)

HENCE option (b) is correct.

ANSWER 9=>(b)option

(b) option is correct because there are some ratios which have quantities with same units like FOR  EXAMPLE=> ratios of two weights(kilograms) i.e., of different persons.

and there some ratios which have quantities with different units such as

the ratio of distance(metres) and time(seconds) which gives us speed.

                                     THANK  YOU