Chain rule or unitary method

Parin Sir > Quantitative Aptitude (Maths) > Chain rule or unitary method

Aug

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Aug

Examples 5 to 9 of chain rule

(5) If the wages of 12 men for 10 days be Rs. 2500, then find the wages of 15 men for 18 days.

Soln. M₁ = 12 men, D₁ = 10 days, W₁ = Rs. 2500,

M₂ = 15 men, D_{2 …}

Posted in: Examples 5 to 9 of chain rule,

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Aug

Examples 1 to 4 of chain rule

(1) If 19 dolls cost Rs. 247, what do 29 dolls cost ?

Soln. 19 dolls cost Rs. 247

29 ” ” ” ( ? )

Posted in: Examples 1 to 4 of chain rule,

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Aug

Indirect Proportion

☼ Indirect Proportion : Two quantities are said to be indirectly proportional, if one the increase of the one, the other decreases proportionately.

e.g. (i) 10 men can do a piece of work in 6 days

∴ 15 …

Posted in: Indirect Proportion,

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Aug

Direct Proportion

☼ Direct Proportion : Two quantities are said to be directly proportional if on the increase or decrease of the one, the other increases or decreases proportionately.

e.g. (i) 7 ball pen cost Rs. 35

∴ 9 ” …

Posted in: Direct Proportion,

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Aug

Chain rule and unitary method

☼ Chain Rule : The method of finding the fourth proportional when the other three are given is called rule of three.

Repeated use of rule of three is called chain rule.

☼ Direct Proportion : Two quant…

Posted in: Chain rule or unitary method,

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