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The base of a triangular prism is a right triangle with a base of 5 inches, a height of 12 inches, and a third side length of 13
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The speed of motorboat in still water is 25 km/hr and speed of current is 5 km/hr
<em><u>Solution:</u></em>
Given that, motorboat traveling with a current can go 120 km in 4 hours
In water, the direction along the stream is called downstream
<em><u>Let us find the downstream speed</u></em>
Downstream distance = 120 km
time taken in downstream = 4 hours
The speed is given by formula:
Thus downstream speed = 30 kilometer per hour
<em><u>Against the current, it takes 6 hours to go the same distance</u></em>
The direction against the stream is called upstream
<em><u>Let us find upstream speed</u></em>
Upstream distance = 120 km
time taken in upstream = 6 hours
Thus upstream speed is 20 kilometer per hour
<em><u>Formula to use:</u></em>
If the speed downstream is a km/hr and the speed upstream is b km/hr, then:
Therefore,
Thus speed of motorboat in still water is 25 km/hr and speed of current is 5 km/hr