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xmanavongrove55
13.09.2019 •
Mathematics
Rebecca went swimming yesterday. after a while she had covered one fifth of her intended distance. after swimming six more lengths of the pool, she had covered one quarter of her intended distance. how many lengths of the pool did she intend to complete?
a. 40
b. 72
c. 80
d. 100
e. 120
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Ответ:
Option E.
Step-by-step explanation:
Let the intended length of Rebecca's swimming is = x units
and we assume the length of the pool = l units
Now it is given in the question that " She covers one fifth of her intended distance "
That means distance covered =![\frac{x}{5}](/tpl/images/0229/3841/c56ee.png)
" After swimming six more lengths of the pool she had covered one quarter of her intended distance"
So![\frac{x}{5}+6(l)=\frac{x}{4}](/tpl/images/0229/3841/9c59f.png)
x = 20×(6l)
x = 120l
Therefore, Rebecca has to complete 120 lengths of the pool.
Option E is the answer.
Ответ:
kyle hiked way faster
Step-by-step explanation: