If the sides of a square are doubled, the percentage change in its area is ;
A200
B300
C400
D100
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ഒരു പരീക്ഷയിൽ 30% കുട്ടികൾ വിജയിച്ചു. വിജയിച്ച കുട്ടികളുടെ എണ്ണം 60 ആണെങ്കിൽ പരാജയപ്പെട്ടവരുടെ എണ്ണം എത്ര ?
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