Question

There is a narrow rectangular plot, reserved for a school, in Mahuli village. The length and breadth of the plot are in the ratio 11:4. At the rate Rs100 per meter it will cost the village panchayat 75000 to fence the plot. What are the dimensions of the plot? (5x1 Mark) (a) Find the perimeter of rectangular plot. (a) 750cm (b) 75000cm (c) 75cm (d) none of these (b) What is the difference between the length and breadth of the plot are in the ratio? (a) 11x (b) 15x (c) 7x (d) 4x (c) How much part of length of of rectangular plot? (a) 4x (b) 11x (c) 15x (d) 7x1 (d) What are the dimensions of the plot? (a) 275cm, 100cm (b) 550cm, 200cm (c) 500cm, 250cm (d) none of these (e) Find the total cost of village panchayat to fence the plot at the rate of Rs 200 per meter (a) Rs75000 (b) Rs150000 (c) Rs 100000 (d) 105000​

Answer 1

Answer:

Mass of empty density bottle, M1 = 30 grams

MAss of bottle and water, M2 = 75 grams

Mass of liquid and liquid x, M3 = 65 grams

Mass of water = M2 – M1 = 45 grams

a) Volume of density bottle = Mass of water = 45 grams

b) Density of liquid x, D = mass of liquid/mass of water = 35/45

Mass of iquid = M3 – M1 = 65 – 30 = 35 grams

D = Mass of liquid/mass of water = 35/45 = 0.77 grams/cm3

c) Mass of water in the density bottle = 75 – 30 = 45 grams

Therefore, the volume of water in density bottle = 45 cc

Mass of the liquid whose volume is equal to the density bottle = 65 – 30 = 35 grams

Therefore, relative density of the liquid = mass of 45 cc of liquid/mass of 45 cc of water = 35/45 = 7/9 = 0.77