Let the weight of the pieces of diamond be 2x, 3x, 4x, 5x Total weight of diamond = 2x + 3x + 4x + 5x = 14x Price ∝ (weight)2 => Price = k(weight)2 ; where, K is constant Original price = k(14x)2 Price of pieces = (4kx2 + 9kx2 + 16kx2 + 25kx2) = 54kx2 Loss in price = 196kx2 – 54kx2 = 142kx2 which is given as 142,000 => 142kx2 = 142000 => kx2 = 1000 Original price = 196kx2 = 196 x 1000 = 196000
A boat can cover 40 km upstream and 60 km downstream in 13 hour. Also it can cover 50 km upstream and 72 km downstream in 16 hour. Find the speed of boa...
A submarine can navigate 112 km upstream and 130 km downstream, and it takes a total of 8 hours and 6 minutes to complete this journey. Now, the task is...
A boat's speed in still water is 50% greater than the speed of a stream, which flows at 12 km/h. Calculate the total time it takes for the boat to cover...
A boat running downstream covers a distance of 36 km in 6 hrs and covering the same distance upstream in 9 hrs. What is the speed of a boat in still water?
A man can row 25/2 km an hour in still water and he finds that it takes him thrice as long to row up as to row down the river. The rate of stream is:
Calculate the speed of a boat in still water if it travels 176 km downstream in 11 hours and returns 144 km upstream in 18 hours.
A boat covers 35 km downstream in 2 h and covers the same distance upstream in 7 h. Find the speed (in km/h) of the boat in still water.
Ratio of still water speeds of three boats is 3:4:5. The first boat travels downstream, the second and third boats travel upstream. They travel in strea...
Speed of a boat in still water is 3 times more than the speed of stream. If boat covers 135 km in downstream in 9 hours, then find the time taken by the...
A Swimmer Walks 30km along the flow of the river in 3 hours 45 minutes and walks 15km against the flow in 2 hours 30min. Find the speed of the boat in S...
