A motorboat goes downstream 30 kilometre and again return to the starting point in a total time 4 hours and 30 minutes if the speed of steam 5 per kilometre find the speed of the motor still water

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

30005

yes ok                                            

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step-by-step explanation:

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