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Find how many minutes does it take spread the rumour to 768 persons.
47.5m
26 There are 9 coins. One of 9 is less weighted and others have equal
weighted. Find the minimum no of balances
to find the defective coin? Ans. 2
27 2500 km distance between Mumbai & Calcutta, Calculate the average
speed. 1) from Mumbai to calculate 25
hrs 2) speed during the return journey was 150 km/hr. 3) speed during the
forward journey is 100 km/hr. a) if
it can be answered using each of the given above . Mark b) if it can be
answered using two of them. Mark c) If
it can be answered using none of them. Mark d) if none of them is required
to answer.Ans. (b)
28 Three birds cross a point at the same instant with equal speed. Two of the
birds fly exactly in opposite
direction. After they cross the point at any instant of time the three birds are
joined by straight lines to form a
triangle. The nature of the triangle is
i) Isosceles ii) equilateral iii) Right angled iv) Right-angled isosceles
29 Three birds cross a point at the same instant with equal speed. Two of the
birds fly exactly in opposite
direction. After they cross the point at any instant of time the three birds are
joined by straight lines to form a
triangle. The nature of the triangle is
i) Isosceles ii) equilateral iii) Right angled iv) Right-angled isosceles
30 There are two parallel streets in North-South direction. A lives in street 1, B
lives in street 2, A goes 10 km
north and B goes south 8 km to meet the east west road. A moves 4 km
east and B moves 6 km west to
meet each other. Find distance between houses owned by A & B. Ans:20
31 A question on eco system.(Inference: Food energy in the eco system
depends on the type of population.)
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