Question
A boat travels faster than the stream by 28 km/h. It
covers a distance of 112 km upstream and returns 132 km downstream, all within 7 hours. Calculate the speed of the boat in still water, expressing your answer in meters per second.Solution
Let speed of stream = ‘x’ km/h Speed of boat = (x + 28) km/h Upstream speed = x + 28 – x = 28 km/h Downstream speed = x + x + 28 = ‘2x + 28’ km/h According to question; 112/28 + 132/(2x + 28) = 7 Or, 132/(2x + 28) = 3 Or, 2x + 28 = 44 Or, x = 8 Seed of boat = 8 + 28 = 36 km/h = 36 × 5/18 = 10 m/s Hence, option d.
The speed ratio of train A to train B is 3:2, and both trains are of equal length. Train A takes x seconds to cross train B when they are moving in the ...
Find the value of the given expression.
A sphere is inscribed in a cylinder. The radius of the cylinder is 7 cm. What is the volume of the sphere?
A car travels 120 km in 1 hour and then travels 80 km in 1.5 hours. What is the average speed of the car for the entire journey?
{656.08 + 89.13 - 291.91 + 319.31 - 402.98} = ?
Ajay and Bijay can individually complete a task in 18 days and 24 days, respectively. If they work together to finish the task an...
What will be come in place of (?) in the given number series.
2, 3, 5, 7, 11, ?, 17Which computer part is responsible for storing data permanently, even when the power is turned off?
The curved surface area of a right circular cylinder with a radius of 7 cm is 440 cm². If the height of the cylinder is increase...
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between x and y and choose the...
Relevant for Exams:
