Which of the following are correct ?
A. Speed of 50 km/hour is equivalent to 15 m/s
B. The area of a rhombus with diagonals of 4 cm and 6 cm is 12 cm²
C. ∛√729 is greater than 4
D. The cost price of 10 bananas is the same as the selling prices of 8 bananas. The percentage profit is 25%
Choose the correct answer from the options given below :निम्नलिखित में से कौन से कथन सही हैं ?
A. 50 किलोमीटर प्रति घंटा की चाल 15 मीटर प्रति सेकंड के समान है।
B. 4 सेमी और 6 सेमी विकर्ण के समचतुर्भुज का क्षेत्रफल 12 सेमी² होता है।
C. ∛√729 , 4 से बड़ा है।
D. 10 केलों की लागत उतनी ही है जितना कि 8 केलों का विक्रय मूल्य। लाभ प्रतिशत 25% है।
नीचे दिए गए विकल्पों में से सही उत्तर चुनिए :
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Correct answer: C. B and D Onlyकेवल B और D
Explanation
A is wrong: 50 km/h = 50 × 5/18 = 13.89 m/s, not 15 m/s. B is correct: area of a rhombus = ½ × d₁ × d₂ = ½ × 4 × 6 = 12 cm². C is wrong: √729 = 27 and ∛27 = 3, which is less than 4. D is correct: taking CP of 10 bananas = SP of 8 bananas, profit % = (10 − 8)/8 × 100 = 25%. Hence B and D only.A गलत है: 50 किमी/घंटा = 50 × 5/18 = 13.89 मीटर/सेकंड, 15 नहीं। B सही है: समचतुर्भुज का क्षेत्रफल = ½ × d₁ × d₂ = ½ × 4 × 6 = 12 वर्ग सेमी। C गलत है: √729 = 27 तथा ∛27 = 3, जो 4 से छोटा है। D सही है: 10 केलों का क्रय मूल्य = 8 केलों का विक्रय मूल्य लेने पर लाभ % = (10 − 8)/8 × 100 = 25%। अतः केवल B और D।More Mathematical Reasoning and Aptitude questions
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