a) 12 b) 16 c) 17 d) 18 correct answer is: d) 18 Explanation Let the fourth proportional be Then, the proportion is The cross-product rule is: – (Product of extremes = Product of means)So, ...
a) 0 b) -1 c) 3 d) -3 correct answer is: a) 0 Explanation Ans:
a) 3 b) 9 c) 7 d) 5 correct answer is: b) 9 Explanation [cross multiply] Ans:
a) 990075 b) 990925 c) 990025 d) 990035 correct answer is: c) 990025[formula use: ] Explanation Ans:
a) 5 b) 6 c) 7 d) 9 correct answer is: a) 5 Explanation Let the number which will add is According to the question,So, the number is which added to each term of the ratio ...
formula use:1st formulaprove: [proved] 2nd formulaprove: [proved] Explanation Here, Now, [put the value of ‘ 4ab’ & ‘2(a2 + b2)’] Ans: The value of ...
a) ₹2500, ₹3000, ₹100 b) ₹1500, ₹2500, ₹1600 c) ₹1000, ₹2100, ₹2500 d) ₹700, ₹2100, ₹2800 correct answer is: d) ₹700, ₹2100, ₹2800 Explanation The ratio is Let, A get B get C get ...