A can do a piece of work in 15 days, which B can do in 10
days. B worked at it for 8 days. A can finish the remaining
work in
(a) 2 days
(b) 3 days
(c) 5 days
(d) 10 days
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Which of the following statements is wrong ? (a) sin2? + cos2? = 1 (b) 1 + tan2? = sec2? (c) sin2? - cos2? = 1 (d) sin2? = 2 sin? cos?
______ is the example of inorganic component of environment. (a) Plants (b) Animals (c) Air (d) All of these
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Two observations for a length are found to be 1.5 cm and 1.50 cm. Then (a) The two are identical (b) The first has greater accuracy (c) The second has greater accuracy (d) Zero in the second has no relevance
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Superconductor is an object which has (a) Maximum resistance (b) Zero resistance (c) Unlimited resistance (d) Negative resistance