Answer:
I would say (C.) -4
Step-by-step explanation:
makes the most since
B. 55
C. 231.5
D. 235
The area that can be covered with grass seed by Derek is 8/15 acres.
Time spent while applying grass seed to 2/5 acre = 3/4 hour
Or, 3/4 hour is needed to apply grass seed to 2/5 acre.
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
3/4 hour ≡ 2/5 acre
1-hour ≡ (2/5)/(3/4) acre
1-hour ≡
1-hour ≡ acre
So, Derek can cover acre per hour.
Hence, the area that can be covered with grass seed by Derek is 8/15 acres.
To get more about the unitary method visit:
25.35
B.
60
C.
166.7
D.
2535
She dips 9/20 in yellow
The part of the cloth that is dipped in both colours turns green.
Work out the fraction of cloth that turns green.
plz show working
Answer:
Fraction of cloth that turns green =
Step-by-step explanation:
Let total cloth be of length = 1 unit
Given of it is dipped in blue dye.
Fraction which is not dipped in blue is given as:
⇒
Taking LCD to subtract fractions.
⇒
⇒
She dips in yellow.
Comparing the fraction dipped in yellow which is and fraction which is not dipped in blue i.e.
Taking LCD between 8 and 20 = 40
We have:
Thus, we can say
Since , so the part dipped in yellow will also cover some part which is blue.
Thus, fraction dipped in yellow and blue which turns green will be given as:
⇒
Subtracting by taking LCD =40.
⇒
⇒
⇒ (Answer)