The downstream speed of a boat is 6 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 8:3. Find the total time taken by boat to travel 33 km downstream and 25 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) = 6 ⇒ y = 3 km/hr ⇒ x = 3 × 8/3 = 8 km/hr Required time = [33/(8+3)] + [25/(8−3)] = 8 hr
An item costs ₹400. During a festival sale, a company offers a sale discount that offers x% off on its regular price along with a discount coupon of 1...
If the diameter of a sphere is 63 cm, then what is the total surface area of the sphere?
If the radius and height of a right-angled cone is 21metres and 18metres, individually, then find the volume of the cone.
Find the length of the side of a regular octagon which is formed by cutting the corner of square of side 30 cm?
If base of a prism is square of side 5 cm & height is 30 cm . What is the volume of prism?
If the area of a square field is 676 m2, then find the diagonal of the square field.
A solid cube of side 8 cm is dropped into a rectangular container of length 16 cm, breadth 8 cm and height 15 cm which is partly filled with water. If t...
The average price of 80 mobile phones is Rs. 30,000. If the highest and lowest price mobile phones are sold out then the average price of remaining 78 m...
A cylinder 84 cm long is made of steel. Its external and internal diameters are 10 cm and 8 cm respectively. What is the volume of the steel in the cyli...
Perimeter of a square shaped plot is 160 metres and the area of a rectangular plot is 40% more than that of the square shaped plot. Find the area (in m<...
