Answer:
6.11km/hr
Step-by-step explanation:
Let the speed that Kelli swims be represented by Y
Speed of the river = 5km/hr
Distance = Speed × Time
Kelli swam upstream for some distance in one hour
Swimming upstream takes a negative sign, hence:
1 hour ×( Y - 5) = Distance
Distance = Y - 5
She then swam downstream the same river for the same distance in only 6 minutes
Downstream takes a positive sign
Converting 6 minutes to hour =
60 minutes = 1 hour
6 minutes =
Cross Multiply
6/60 = 1/10 hour
Hence, Distance =
1/10 × (Y + 5)
= Y/10 + 1/2
Equating both equations we have:
Y - 5 = Y/10 + 1/2
Collect like terms
Y - Y/10 = 5 + 1/2
9Y/10 = 5 1/2
9Y/ 10 = 11/2
Cross Multiply
9Y × 2 = 10 × 11
18Y = 110
Y = 110/18
Y = 6.1111111111 km/hr
Therefore, Kelli's can swim as fast as 6.11km/hr still in the water.
Answer:
45 for 5 and 34 for 6.
Step-by-step explanation:
You are just subtracting by 11.
Answer:
48 cm is the answer
Step-by-step explanation:
Using Perimeter of rectangle = 2(l+b)
=> 2(4+2)
=> 2(6)
=> 12
As 4 rectangles multiply by 4
so, 12 × 4
= 48
<em><u>Any questions you may ask. </u></em>
Answer:
158cm squared
Step-by-step explanation:
Area of triangle=1/2×b×h
Area of rectangular base of prism=l×w
Area of 2 rectangular sides of the prism=l×w
So Total surface area= 1/2×6×5×2)+(8×6)+(8×5×2)=158cm squared