ATQ, Let the efficiency of each boy be 'b' units/day. Total work = x × 18 × b = '18xb' units ATQ: 18xb = x × b + (x - 15 × 1) × b + (x - 15 × 2) × b + (x - 15 × 3) × b + .... + (x - 15 × 23) × b Or, 18x = 24x - 15 × (1 + 2 + 3 + .... + 23) Or, 6x = 15 × (23/2) × (23 + 1) [since, sum of first 'n' natural numbers = (n/2) × (n + 1) ] So, 'x' = 690 Therefore, required value = 0.2 × 690 = 138
How is ‘oral’ written in a code language?
I. ‘ oral and written’ is written as ‘ ho jo ko’ in that code language.
II. ‘...
Do the points P, Q and R lie in a straight line?
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I. D is the unmarried nephew of F, who is the paternal aunt of A, who is the son of E, who has a grandson B.
II. C ...
How is P related to E?
Seven persons R, P, Q, V, A, X and M were born in different months March, May, June, August, September, October and November but not necessarily in the ...
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Statement I: Box I is heavier than box H and J but not...
In the given coded language, how is the word ‘numbers’ coded?
Statement I:‘decoding followed by coding’ is coded as ‘zx, ar, cp, ltâ€...
Who among A, B, C, D, and E is the tallest?
I. A is taller than B. E is not the tallest.
II. C is taller than A. D is not the tallest.
How is ‘ready’ written in a code language?
I. In the code language ‘ready to go’ is written as ‘so lo do’ and ‘ready the way’ ...
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