Question
Find the total distance covered by boat in each
upstream and downstream in 6 hours if the speed of boat in still water and speed of current is 20 km/h and 4 km/h respectively.Solution
Speed in upstream = 20 – 4 = 16 km/hr Speed in downstream = 20 + 4 = 24 km/hr Required total distance= (16 + 24) × 6 = 240 km
- In the figure P is a point which is 12 cm away from the centre of the circle O. A line drawn from P point cuts circle at point A and B respectively. If... 
- The 2nd approximation to a root of the equation x2-x-1-0 in the interval (1, 2) by Bisection method will be: 
- If G is the centroid and AD, BE, CF are three medians of ∆ABC with area 108 cm² , then the - area of ∆EFG is? 
- A rectangle with a diagonal of length 28m is inscribed in a circle. Find the area of a circle? 
- The perimeters of 2 similar triangles ∆ABC and ∆PQR are 18 cm and 12 cm respectively. If PQ= 8 cm, then AB is? 
- The length of a tangent from a point A at a distance 5 cms. from the centre of the circle is 4 cms. Radius of the circle is 
- What will be inradius of a right angle triangle whose base is 12 cm & height is 35 cm ? 
- A right triangular pyramid XYZB is cut from cube as shown in figure. The side of cube is 16 cm. X. Y and Z are mid points of the edges of the cube. What... 
- If median AD of an equilateral ∆ABC is 21 cm and G is centroid. Find GD?