Well, first of all, you have to compare. That will be;
30 seconds= 24 hops
50 seconds= y hops
I represented the unknown with y. Anyway, now you have to cross multiply. So y multiplies 30 and 24 multiplies 50. So that will be;
30y= 1200.
Now, you have to divide the both sides by 30. You have to do this because you need to remove everything that is attached to y to find y. Anyway, you have to divide because the relationship between y and 30 is multiplication. And the opposite of multiplication is division. Anyway;
30y/30=1200/30
y= 40. So your answer is 40 hops
Hope i helped. Have a nice day.
