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Let speed of boat in upstream and downstream be ‘7x’ km/h and ‘9x’ km/h respectively. 35/7x + 135/9x = 4 5/x + 15/x = 4 30 = 4x x = 15 Speed of boat in still water = (7x + 9x)/2 = 8x = 8 × 15 = 40 km/h Desired time = 180/40 = 4.5 hours
The volume and height of a cylinder are 7436 cm3 and 14 cm. Find the radius of the cylinder.
Sahil jogs 6 times around a square field whose each side measures 16 metres. Mohan jogs 4.5 rounds around a rectangular field whose length is 30 metres ...
If ratio of interior exterior angle of a regular polygon is 2:3, then number of sides of the polygon is
The surface areas of three faces of a cuboid sharing a vertex are given as 25 m², 32 m² and 32 m². What is the volume of the cuboid?
(180/3)% of the raindrops could have been collected, when 8 cm of rain has fallen on a part of land of area 2.5 km2, in a tank having a 200 m...
A 18 m long ladder (whose foot is on the ground) leans against a wall making an angle of 60° with the wall. What is the height (in m) of the point w...
A rectangular ground is 95 metre long and 75 metre broad. If two 10 metre wide paths one parallel to the breadth and one parallel to the length, of the�...
A closed wooden box of uniform thickness has length, breadth and height 20cms, 16cms and 12 cms respectively. If the thickness of the wooden block is 2 ...
If the volume and radius of a cylinder is 24640 cm3 and 28 cm respectively then find the height of the cylinder?
