Question
What will come in the place of the question mark (?) in
the following equation if βββ and βΓβ are interchanged and βΓ·β and β+β are interchanged? 6 β 8 Γ· 12 + 3 Γ 9 + 3 Γ· 17 = ?Solution
The correct answer is B
A boat can cover 145 km in downstream in 5 hours and 144 km in upstream in 8 hours. Find the speed of boat in still water.
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