A) 15 years
B) 19 years
C) 17years
D) 12 years
Correct Answer: B
Solution :
w.k.t \[P+R+2Q~\] \[=59\] ?..(i) \[Q+R+3P\] \[=68\] ?.(ii) \[3(P+Q)+2R\] \[=108\] ?..(iii) From \[e{{q}^{n}}\](i). (iii) \[e{{q}^{n}}(1)\times 3-e{{q}^{n}}\,(iii)\] \[3P+3R+6Q\] \[=177\] \[3P+3Q+2R\] \[=108\] 3Q + R = 69 ? (iv) \[e{{q}^{n}}\,\,(iii)-(ii)\] 2 Q + R = 40 ? (v) From (iv) and (v), \[Q=29,\text{ }R=-18\] Put in \[e{{q}^{n}}\text{ }\left( 2 \right)\] \[29-18+3P=68\] \[3P=57\] P = 19You need to login to perform this action.
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