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രാജുവിന്റെ അമ്മയുടെ പ്രായം രാജുവിനെക്കാൾ 9 മടങ്ങാണ്, 9 വർഷം കഴിയുമ്പോൾ ഇത് മൂന്നു മടങ്ങായി മാറും രാജുവിനെ ഇപ്പോഴത്തെ പ്രായം എത്രയാണ്?

A6

B9

C5

D3

Answer:

D. 3

Read Explanation:

രാജുവിനെ R എന്നും അമ്മയെ M എന്നും എടുക്കാം . M = R × 9 -------(1) 9 വർഷങ്ങൾക് ശേഷം M+9=(R+9) × 3 M+9=3R+27 M=3R+18 --------(2) (2)-(1) R = 3


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