Let the speed of the boat in still water and the speed of the current be ‘x’ km/hr and ‘y’ km/hr, respectively Upstream speed of the boat = (x – y) = 160/8 = 20 km/hr Or, 30 – y = 20 Or, y = 30 – 20 = 10 km/hr Therefore, downstream speed of the boat = 30 + 10 = 40 km/hr Required time taken = 160/40 = 4 hours
Length and breadth of a rectangle are 8 cm and 6 cm respectively. The rectangle is cut on its four vertices such that the resulting figure is a regular ...
The ratio of curved surface area of a right circular cylinder to the total area of its two bases is 2 : 1. If the total surface area of cylinder is 2310...
A regular polygon has an interior angle of 144°. How many sides does the polygon have?
If O is the orthocentre of ΔABC , if∠ BOC = 1050 then what is the measure of ∠ BAC?
If median AD of an equilateral ∆ABC is 15 cm and G is centroid. Find GD?
ABCD is a square. P, Q, R and S are points on the sides AB, BC, CD and DA respectively such that AP = BQ = CR = DS. Angle SPQ equal to ?
In triangle ABC, angle A is 90 
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In ∆ABC, AB = 5cm, BC = 10cm, and AC = 13cm then find out the value of cos A.
What is the sum of the smallest and the largest angles of th...
Let G be the centroid of the equilateral triangle ABC of perimeter 24 cm. Then the length of AG is
