Question
A boat running downstream covers a distance of 30 km in
2 hrs and covering the same distance upstream in 10 hrs. What is the speed of a boat in still water?Solution
Downstream speed = 30/2 = 15 km/hr Upstream speed = 30/10 = 3 km/hr So speed of boat in still water = (15 + 3)/2 = 9 km/hr
Find the area of the triangle whose vertices are (3, 6), (– 3, 2) and (4, 1).
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What is the mean of the following data given below:
3,7,9,5,11,13,8,12,15,12,4
If p = 50 - q - r and pq + r(q + p) = 816 then find the value of (p2Â + q2Â + r2) .
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A triangle ABC is inscribed in a circle. The tangent at A meets the extended sides BC and AB at points P and Q, respectively.
If ∠ACB = 30° an...
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