Question
3 chairs and 2 tables cost Rs. 700 and 5 chairs and 3
tables cost Rs. 1100. What is the cost of 1 chair and 2 tables?Solution
ATQ, Set up equations: 3x+2y=700 (3 chairs and 2 tables cost Rs. 700) 5x+3y=1100 (5 chairs and 3 tables cost Rs. 1100) Solve using elimination: Multiply the first equation by 3: 9x+6y=2100 Multiply the second equation by 2: 10x+6y=2200 Subtract to find x: x=100 Find y: Substitute x=100 into 3x+2y=700 to get y=200. Calculate the desired cost: x+2y=100+2(200)=500 Rs. The cost of 1 chair and 2 tables is Rs. 500.
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
111.89 × 4.12 – 504.04 ÷ 2.12 = 170.12 + ?
66.05 × 17.95 – 38.99 × 18.12 = (60 + ?) × 6
Find the approximate value of Question mark(?) for given equation.Â
135.86% of 249.99 + 24.95 × 14.03 ÷ 2.01 = ?
386.99 + 397.99 + ? - 232.02 = 35.02 × 31.99
( 22.01%  of 899.80 ) × 15.99 = ? 2 + 27.98 × 2400 ÷ 800
44.89% of 1199.78 + 319.68 = ? × 42.79
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
?% of [(12.96 × 40.05) + 25.08 × 18.96] = 17.96 × 22.05 + 3.05 × 66.96Â
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