DownstreamUpstream Time-5:11=>2.2=22/10=11/5 Speed- 11:5 Let the Downstream Speed=11x and upstream speed =5x Now ATQ- 11x =55/2.5 X=2 Speed of boat in still water =(11x+5x)/2 =16x/2=8x =8×2=16km/h
If angle between two sides of 3 cm & 2 cm of a triangle is 30°. what is the area of the triangle ?
A regular polygon has an interior angle of 144°. How many sides does the polygon have?
At the centre of a circle of 20 cm radius, the angle made by an arc of 24(4/9) cm length is
If in a right angle triangle ABC, Angle B is a right angle. AB = 20 cm, BC= 21 cm if BD is perpendicular to AC find the length of BD?
What is the volume of a cylinder if the radius of the cylinder is 10cm, and the height is 20 cm? (Take π = 3.14
What will be inradius of an equilateral triangle of side 12 cm?
The dimensions of a luggage box are 70 cm, 50 cm, and 30 cm. How many sq. cm of cloth is required to cover the box?
If the points P(2, 3), Q(5, a) and R(6, 7) are co-linear, then find the value of 'a'.
The lengths of three medians in a triangles are 21 cm, 28 cm, 35 cm. What is the area of that traingle (in cm 2 )?
