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Let speed of downstream and speed of stream be 5x and 3x respectively. Speed of current => 3x = 9 => x = 3 km/hr Downstream speed = 5 × 3 = 15 km/h Speed of boat = 15 - 3 = 12 km/hr Upstream speed = 12 - 3 = 9 km/h Distance travelled upstream in 8 hr = 8 × 9 = 72 km
The circumference of a circle is 77 cm and the length of the rectangle is 4 times the radius of the circle. Find the area (in cm2) of the rec...
A cuboid is formed by combining two identical cubes. If the surface area of each cube is 600 cm², find the total surface area of the resulting cuboid.
If the ratio of areas of two circle is 36:49, then the ratio of their circumferences will be:
Outer diameter of 20 cm long pipe is 25 cm. If the thickness of the metal in the pipe is 1 cm. Find the total surface area of the pipe?
A rectangular frame of size 100 cm (length) x 120 cm (breadth) is to be surrounded by stickers of 2 cm x 2 cm size. How many stickers would be required ...
Length and breadth of a rectangle are in the ratio 2:5. If the perimeter of the rectangle is 36 cm more than the length of the rectangle, then find the ...
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...
The circumference of the two circles is 198 cm and 352 cm respectively. What is the difference between their radii?
