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Question: A boat travels 24 km downstream and 16 km upstream in 4 hours each. Find the speed of the […]

Question: The cost price of 20 articles is equal to the selling price of 16 articles. Find the profit percentage.

Question: A right circular cylinder has radius 7 cm and height 10 cm. Find its total surface area. (π =

Question: Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both are opened

Question: The average of 5 numbers is 30. If one number is excluded, the average becomes 28. What is the

Question: If a² − b² = 40 and a − b = 4, find a + b. यदि a² −

Question: A sum doubles itself in 8 years at simple interest. What is the rate of interest per annum? एक

Question: What is the value of (√5 + √3)² + (√5 − √3)²? (√5 + √3)² + (√5 − √3)²

Question: A man can complete a work in 12 days and a woman in 18 days. How many days will

Question: The area of a circle is 154 cm². Find its circumference. (π=22/7) एक वृत्त का क्षेत्रफल 154 वर्ग सेमी