NextMockપરીક્ષાઓ શોધો, દા.ત. SSC CGL, UPPSC, Lekhpal
UPSC PYQPrelims 2026

Civil Services Examination · પ્રશ્ન 30

Suppose x, y and z are variables taking positive real numbers as their possible values. It is given that y is directly proportional to x² and x is inversely proportional to z. For z = 7/25, the values of x and y are 5 and 50, respectively. If y = 98, what is z equal to?

  1. 1/7
  2. 1/5
  3. 5/7
  4. 1
જવાબ બતાવો અને સમજૂતી

જવાબ: (B) 1/5

સમજૂતી

y ∝ x² and x ∝ 1/z give y ∝ 1/z², so yz² is constant: 50 × (7/25)² = 98 × z², giving z² = 1/25 and z = 1/5.