Hi. This is a bit lengthy so I am attaching an image that shows it worked out step by step. I hope it helps.
Take care,
Diana
Take care,
Diana
(2/3) × (2/3) × (2/3)
1 answer:
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Answer:
The third exterior angle is
Step-by-step explanation:
Given
Required
The third exterior angle
The exterior angles of a triangle add up to 360 degrees.
So:
Make the subject
Substitute known values
Answer:
Speed of the river = km per hour
Step-by-step explanation:
Speed of the boat in still water = 4 km per hour
Let the speed of the river = v km per hour
Speed of the boat upstream = (4 - v) km per hour
Time taken to cover 6 km =
= hours
Speed of the boat downstream = (4 + v) km per hour
Time taken to cover 12 km = hours
Since, time taken by the boat in both the cases is same,
6(4 + v) = 12(4 - v)
24 + 6v = 48 - 12v
12v + 6v = 48 - 24
18v = 24
v =
v = km per hour