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Let units place digit be y and tens place digit be x then, the number will be 10x + y after interchanging the digits we get new number = 10y+x according to question- (10x+y) – (10y+x) = 45 9x- 9y = 45 x-y= 5 and also, x = y^2-1 now, y^2-1-y = 5 y^2- y - 6 = 0 Solving this quadratic equation, we get y = 3, -2 But here negative value in not possible Hence y = 3 And x = 8 New number will be = 10y + x = 38 50% of the number = 19
In ∆ABC , G is the centroid , AB = 5 cm, BC= 8 cm and AC = 7 cm , find GD, where D is the mid-point of BC?
Find the area of triangle having sides in the ratio 4:5:7 & the perimeter of the triangle is 16 cm
∆ABC and ∆DEF are similar and their areas are respectively 16 cm2 and 64 cm 2 . If EF = 6 cm BC is?
A cuboid of size 50 cm × 40 cm × 30 cm is cut into 8 identical parts by 3 cuts. What is the total surface area (in cm2) of all the 8 parts?...
In ΔABC, PQ is parallel to BC If AP: PB= 2:5 and AQ= 2 cm, AC is equal to?
If O is circumcentre of acute angled triangle ABC, if ∠ BOC = 150˚ then ∠ BAC = ?
In ΔABC, PQ is parallel to BC If AP: PB= 3:4 and AQ= 6 cm, AC is equal to?
The area of a field in the shape of a hexagon is 2400 √ 3 m2 ? What will be the cost of fencing it at ₹18.50 per metre?
If I is the incentre of ΔABC , if ∠ BAC = 650 , then what is the measure of ∠ BIC?