Answer:
Statement says that,
<em>x varies inversely with y²</em>
According to the above problem,we get
x=k/y², where k is a constant
Now, x=10 when y=7, so the value of k is
10=k/7²
k=10×7²
k=10×49
<u>k=490</u>
Hence, when y=10,
we have to find the value of x
So by putting the value of k, we get
x=490/(10)²
x=490/100
<u>x=4.9</u>
★ <em><u>x</u></em><u><em>=4.9</em> is the right answer.</u>