Question
A stone worth Rs.3800 drops and breaks with weight in
the ratio 2:3:5. The price of stone is directly proportional to square of its weight. Find the total loss?Solution
Let the weight of stone is 10Kg. So when it breaks, the weight of parts will be 2Kg, 3Kg & 5Kg. Now it is given that Price of stone is directly proportional to square of its weight. Original price was Rs.3800 & Let new price after break be x. Price/(Weight) 2 = constant ; So 3800/(10) 2 = x /(2 2 +3 2 +5 2 ) 3800/100 = x/38 x = Rs.1444; So the loss will be = 3800 β 1444 = Rs.2356
A is cycling at an average speed of 24 km/hr such that he can reach a certain point at 12 noon. If he cycles at 36 km/hr, then he will reach the destina...
A cheetah spotted a fox running away at 6 m/s and started chasing it at 10 m/s. The fox was 120 metres ahead at that moment. Find the time taken by the ...
Driving at (4/5) of his usual speed, a man reaches his destination 36 minutes late. Find the time he normally takes to cover the distance.
If the diameter of a sphere is 42 cm, find the total surface area of the sphere.
Two trains for Mumbai leave Delhi at 6 a.m. and 6:30 a.m. and travel at 100 km/h and 136 km/h respectively. Approx. how many km from Delhi will the two ...
βAβ and βBβ started moving towards each other at same time with a speed of 12 km/hr and 16 km/hr, respectively. If the distance covered by βB ...
- Two bikers, βCβ and βDβ, start from point βRβ and βSβ respectively towards each other. They meet after 7 hours, and biker βDβ has trave...
βAβ and βBβ started moving towards each other at same time with a speed of 22 km/hr and 33 km/hr, respectively. If the distance covered by βAοΏ½...
- Bus 'X' and Bus 'Y' start together from a station heading in the same direction. Bus 'X' moves at 18 km/h while Bus 'Y' moves at 30 km/h. Determine the dis...
The ratio of the speeds of Y and Z is 7 : 5. When Y increases his speed by 40%, he covers 294 km in 3 hours. Find the time taken by Z to cover 200 km.
Relevant for Exams:
