Aptitude Question:
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The size of a program is N.And the memory occupied by the program is given by M=square root of 100N.If the size of the program is increased by 1% then how much memory now occupied?

Answer:

given.. M=10N^(1/2)................................eqn (1)
dM/dN=10.1/2.N^(-1/2)
or, dM=1/2(10.N^1/2)dN/N
dM=1/2(M)dN/N........................frm eqn (1)
dM/M=1/2.dN/N
put dN/N=1%.........................................frm d qs.
s, dM/M=.5%.......................Answer

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One fast typist type some matter in 2hr and another slow typist type the same matter in 3hr. If both do combine in how much time they will finish?A telephone cable is to be run from a junction point on the bank of a river 900 meters wide to an office that is located 3000 meters downstream on the opposite bank. If the cost of laying cable under water is Rs. 5 per meter and that of laying overhead on land is Rs. 4 per meter, find the point downstream where the cable is to cut across the river.
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