The downstream speed of a boat is 4 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream is 5:2. Find the total time taken by boat to travel 42 km downstream and 30 km upstream?
Let the speed of boat in still water be x km/hr and that of stream be y km/hr. ATQ, ⇒ (x + y) – (x – y) = 4 ⇒ y = 2 km/hr ⇒ x = 2 × 5/2 = 5 km/hr Required time = [42/(5+2)] + [30/(5−2)] = 16 hr
In a circle AB is diameter & C is a point on circumference such that AC = 13 cm & BC = 84 cm then find the area of circle ?
If a wheel covers a distance of 2200 cm in 7 rotations, then the diameter of the wheel is?
Find out the circumference of a sector whose radius is 7 cm and it makes the angle of 45° at the centre.
If a wheel covers a distance of 660 m in 30 rotations, then the diameter of the wheel is?
Two chords AB and CD of a circle intersect at E such that AE = 3.4 cm, BE = 4.2 cm and CE = 2.6 cm. What is the approximate length of DE?
In the given figure, ABC and MNC are two secants of a circle which intersect each other at C outside the circle. AN is the diameter of the Circle. If an...
A circle touches all four sides of a quadrilateral. If AB = 18 cm, BC = 21 cm, and AD = 15 cm, then what is the length of CD?
A metal wire when bent in the form of a square encloses an area 1089 cm 2 , if the same wire is bent in the form of a circle, then its area is?
The circumference of a park is 750m. A and B start walking from the same point in the same direction at 6.75 kmph and 4.75 kmph. Among the given options...
AB and AC are two tangents of a circle of centre O with radius 5cm. Another tangent is drawn on the circle which intersects AB and AC at m and n respect...
