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Q:

The cost of Type 1 rice is Rs. 15 per kg and Type 2 rice is Rs.20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then the price per kg of the mixed variety of rice is

A) Rs. 19.50 B) Rs. 19
C) Rs. 18 D) Rs. 18.50
 
Answer & Explanation Answer: C) Rs. 18

Explanation:

Let the price of the mixed variety be Rs. x per kg. By the rule of alligation, we have :

 

Cost of 1 kg of type 1 rice           Cost of 1 kg of type 2 rice  

 

 

 

 

∴(20-x)/(x-15) = 2/3 

⇒ 60 - 3x = 2x - 30

 ⇒ x = 18.

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Filed Under: Alligation or Mixture

Q:

The greatest possible length which can be used to measure exactly the length 7m, 3m 85cm, 12 m 95 cm is

A) 15 cm B) 25 cm
C) 35 cm D) 42 cm
 
Answer & Explanation Answer: C) 35 cm

Explanation:

Required Length = H.C.F of 700 cm, 385 cm and 1295 c

                             = 35 cm.

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Filed Under: HCF and LCM

Q:

Which is the highest waterfall in the world ?

Answer

Angel, Venezuela

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Subject: Longest, Shortest, Deepest

Q:

Which is Largest library in the world ?

Answer

United State Library of Congress, Washington D.C.

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Subject: Longest, Shortest, Deepest

Q:

Which is longest railway station ?

Answer

Grand Central Terminal, Chicago(USA).

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Subject: Longest, Shortest, Deepest

Q:

Which is Place of heaviest rainfall ?

Answer

Mausinram (Meghalaya)

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Subject: Longest, Shortest, Deepest

Q:

Which is smallest state by area of India ?

Answer

Goa

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Subject: Longest, Shortest, Deepest

Q:

Which is highest dam in world ?

Answer

Jinping-I Dam  in China at 305 m (1,001 ft) high

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Subject: Longest, Shortest, Deepest