K walks 10 km towards North. From there he walks 6 km towards South. Then he walks 3 km towards East. How far and in which direction is he with reference to his starting point?
Required distance = √ 3² + 4² = √ 9 + 16 = √ 25 = 5 Km.
A rectangular garden is 20 m long and 15 m wide. If a path of width 2 m is built around the garden, what is the area of the path?
A and B can complete a piece of work in 12 days and 18 days, respectively. They start working together but A leaves after 6 days. How many more days wil...
A pipe can fill a tank in 10 hours, while another pipe can empty it in 15 hours. If both pipes are opened simultaneously, in how many hours will the tan...
4m = Sec A, 4/m = Tan A, find the value of 4( m2 - 1/m2)
If the mean of four observations is 20 and when a constant C is added to each observation the mean becomes 22 the value of C is –
Two pipes can fill a tank in 10 hours and 12 hours, respectively, while a third pipe can empty it in 20 hours. If all the three pipes are opened simulta...
A car travels 300 km at a speed of 60 km/h and another 200 km at a speed of 80 km/h. Find the approximate average speed of the car for the entire journey.
A metal sphere of radius 7.35 cm is melted and cast into a cylinder of height 12 cm. Find the curved surface area of the cylinder...
A cone has a base radius of 7 cm and a slant height of 25 cm. Find the total surface area of the cone.
A closed cylindrical tank has a radius of 7 m and a height of 15 m. Calculate the total surface area of the tank (use π = 22/7).
