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Question

Q1. If 20 pens cost Rs. 100, What do 45 pen cost ?

Rs. 200

Rs. 220

Rs. 225

Rs. 250

Accepted Answer

Answer : Rs. 225

Let the required cost be Rs. x. Then ,

More Pens, More Cost

(Direct Proportion)

∴ 20 : 45 :: 100 : x
⇒ 20 × x = 45 × 100
⇒ x = (45 × 100)/20 = Rs. 225

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