NCERT 2022 | विद्युत्-रसायन - L5 | Electrochemistry | Class 12 रसायन विज्ञान | Mohit Sir | 7 PM

Acids,Bases and pH - Class 10 Science | 7 PM Master Class By Vipin Sir

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 –5, 5 –10, 10 –15 etc. Find the frequency of the class 20 –25.

Monthly consumption of kerosene oil in certain household along with price variations is given below : Rate of kerosene oil (in Rs) 1.5 2 3.0 4.5 Consumption (in litres) 60 45 30 20 When the price goes up to Rs. 6 per litre, what is the likely consumption of kerosene? 7. 5 l i t r e s b. 10 l i t r e s c. 12. 5 l i t r e s d. 15 l i t r e s

Previous Class Revision|NCERT प्रश्नावली 7.5 का हल भाग-2|सारांश

There are twelve friends A, B, C, D, E, F, G, H, I, J, K and L who invested money in some business in the ratio of 1 : 2 : 3 : 4: 5 : 6 : 7 : 8 : 9 : 10 : 11 : 12 and the duration for which they invested the money is in the ratio of 12 : 11 : 10 : 9 : 8 : 7 : 6 : 5 : 4 : 3 : 2 : 1 respectively. Who will get the maximum profit at the end of the year ?

The length , breadth and height of a rectangular block of wood were measured to be l = 13.12 pm 0.02 cm, b = 7.18 pm 0.01 cm, h = 4.16 pm 0.02 cm The perecentage error in the volume of the block will be .