Question
A boat travels 48 km against the current and 144 km with
the current in a total of 9 hours. If the speed of the boat in still water exceeds the stream speed by 16 km/h, find the stream speed.Solution
Let the speed of the stream = x And the speed of the boat in still water = x + 16 48/(x + 16 − x) + 144/(x + 16 + x) = 9 48/16 + 144/(2x + 16) = 9 3 + 144/(2x + 16) = 9 144/(2x + 16) = 6 2x + 16 = 144/6 2x + 16 = 24 2x = 8 x = 4 The speed of the stream = 4 km/hr
Select the correct mirror image of the given figure when the mirror is placed to the left of the figure.
Which of the answer figures is exactly the mirror image of the given figure when the mirror is held at AB?
Select the correct mirror image of the given combination when the mirror is placed at line AB as shown.
Select the correct mirror image of the given combination when the mirror is placed at line MN as shown.
Select the correct mirror image of the given combination when the mirror is placed at line MN as shown.
Select the correct mirror image of the following word when the mirror is placed to the right of the word.
Select the correct mirror image of the given combination when the mirror is placed at MN as shown below:
Which of the following figure is the correct mirror image of the given figure?Â
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