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If the LCM of two numbers a and b is 60 and their HCF is 15. Determine their mean proportion.

A30

B15

C25

D60

Answer:

A. 30

Read Explanation:

Product of two numbers ( a × b ) = LCM × HCF a × b = 60 × 15 a × b = 900 The mean proportion is = √ab = √900 = 30


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ഒരാൾ 20 മീറ്റർ ഉയരമുള്ള ഒരു തൂണിൽ കയറാൻ ശ്രമിക്കുന്നു. ഒരു മിനിറ്റിൽ അയാൾം 3 മീറ്റർ മുകളിലേക്ക് കയറുമെങ്കിലും രണ്ട് മീറ്റർ താഴോട്ടിറങ്ങും. എത്രാമത്തെ മിനിറ്റിൽ അയാൾ മുകളിലെത്തും?