If a shop keeper marks his goods for a certain amount so as to get 25% gain after allowing a discount of 20%, then his marked price is
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A boat covers 63 km upstream in 9 hours and covers the same distance downstream in 7 hours . What is the speed (in km/ hr) of the boat in still water?
When a number is divided by 56, the remainder will be 29. If the same number is divided by 8, then the remainder will be
If tanθ + cotθ = 5, then the value of tan2θ + cot2θ is
In a trapezium ABCD, AB || CD, AB < CD, CD = 6 cm and distance between the parallel sides is 4 cm. If the area of ABCD is 16 sq.cm, then AB is
In a triangle PQR, the side QR is extended to S. ∠QPR = 72° and ∠PRS = 110°, then the value of ∠PQR is
The centroid of a triangle is the point where
If l + m + n = 9 and l2+m2+n2 = 31, then the value of lm + mn + nl will be
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