35. 2061 Partial Q. No. 3 Given below is the distribution of profit (000 Rs.) earned by Book Store in Kathmand,
Valley.
Profit Below Below Below Below Below Below | Below Below | Below
(in Rs. '000')
20 30 40 50 60 70 80 90 100
No. of
5 14 27 48 68
83
91 94 100
persons
Compute coefficient of quartile deviation.
Ans: 0.2

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)

When using the scientist method, which step comes last?