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when car s covered a distance of d on a track, it covered 25% more distance than car t had covered on the same track.
| column a | column b |
|---|---|
| the distance covered by car t | 0.80d |
title
car s and car t
your result
correct
difficulty
hard
your pace
0:04
others' pace
1:29
video explanation
text explanation
we know that d is the distance covered by car s. let x be the distance covered by car t. we are told that d is 25% greater than x. in other words
x(1.25) = d
as is often the case, before we do calculations, it will pay to change the decimal multiplier to an improper fraction.
x= d
solve for x. multiply both sides by the reciprocal of that fraction.
x = d
now, change back to a decimal.
x = (0.80)d
the left side of that equation, x, is the distance covered by car t, the quantity in column a. the right side is the quantity in column b. thus, this equation demonstrates that the two columns are equal.
answer = (c)
related lessons
watch the lessons below for more detailed explanations of the concepts tested in this question. and don't worry, you'll be able to return to this answer from the lesson page.
