Question

plz help guys class-VII plz give the ans scenically i will mark u the brilliant​

Answer 1

Answer:

1) the speed of car is 20m/s

2)

Answer 2

Explanation:

Answer-->(1).

To convert speed of car in m/s we have to divide it by 5/18.

Now,Calculate:-72×5/18

So , now speed in m/s=>20m/s^-1.

Answer-->(2)

As we know , density=mass/Volume.

So,

As Given mass=>252g , Volume=>30cm^3 .

Solution:-Density=252/30

Density=>8.4 G/cm^3

And to Calculate it in kg/m^3 we have to divide 8.4 gm by 100

Now,the total density in kg/m^3=>0.084

hope it will help you Dear.