Question
A person travelled for the first 150 km at a certain
speed in 6 hours. After that, the speed of the person decreased by 6 km/h. If the person took a total of 10 hours to reach the destination, then find the total distance travelled by the person.Solution
ATQ, Speed of the person by which he travelled 150 km = 150/6 =25 km/h Time taken to cover the remaining distance = 10 - 6 = 4 hours Decreased speed of the person = 25 - 6 = 19 km/h Distance travelled with decreased speed = 19 × 4 = 76 km Therefore, required distance = 150 + 76 = 226 km
Twenty five liters of 60% concentration of acid solution is added to 35 liters of 80% concentration of acid solution. What is the concentration of acid ...
- The cost of fencing a rectangular field at the rate of Rs. 13/metre is Rs. 1560. The ratio of the length to the breadth is 7:5. Find the area of the field.
A square’s side is 25% less than the length of a rectangle. The area and breadth of the rectangle are 2000 cm² and 40 cm respectively. Calculate the ...
Find the time taken by a pipe, which releases 400 m3 of water in a minute to fill an empty cylindrical tank of radius 20 m and height 14 m. [...
A cube has edge 13 m. Find its length of diagonal, surface area and volume.Â
The radius of a cylinder is equal to the radius of a circle whose circumference is 88 units. If the height of the cylinder is 50% more than its radius, ...
A rectangular plot of size 40 m (length) Â 20 m (width) is to be grazed by a horse leaving a margin of 5 m from all sides for growing plants and also it...
A room 20 m long, 16 m broad and 8m high has 2 windows of 1 m and `1(1)/(2)` m and a door of 2m `xx` `1(1)/(2)` m. Find the cost of paperi...
The total surface area of a right circular cone is twice the surface area of a sphere having the same radius. If the volume of the sphere is 2304π cm...
The circumference of a circle is 66 cm and the length of the rectangle is 4 times the radius of the circle. Find the area (in cm2) of the rec...
Relevant for Exams:
