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Hello! Remember you have to write complete questions in order to get good and exact answers. I'll help you to understand this problem, but I have to assume some things.
We know that the empty cup in the shape of a cylinder is being filled with water. Suppose the volume of this cylinder is:

Suppose that the cup is filled at a constant rate of
, so in 7 seconds the cup is filled the following amount:

So this represents the following percentage:

Finally, after 7 seconds the cup is 77.78% filled
Answer:
Step-by-step explanation: lets say, rajiv has x marbles.
given: aman has 40 marbles
and aman's marbles are 25 more than half of rajiv's marbles.
so, aman has 25 + x/2 marbles
40 = 25 + x/2
40 - 25 = x/2
15 = x/2
15*2 = x
30 = x
thus, rajiv has 30 marbles.
Answer:
-3
Step-by-step explanation:
X+-4x=3