Question 29
EasyOriginal questionTwelve notebooks cost ₹324. At the same rate, what do 20 notebooks cost?
Show the answer and explanation
CorrectNot quiteAnswer B
Correct answer: B
Explanation
Cost of one notebook = ₹324 ÷ 12 = ₹27.
Cost of 20 notebooks = 20 × ₹27 = ₹540.
Worth noting
₹648 is the cost of 24 notebooks (double 12), not 20.
- Concept
- Unitary method for direct proportion
- Typical timeTypical
- 30 s
- Your timeYours
- —
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