Question
The average age of a husband and his wife was 23 years
when they were married 5 years ago. The average age of the husband, the wife and their child is 20 years now. How old is the child now?Solution
Let present ages of husband, wife and child be x, y and z years respectively. Given, ⇒ [(x – 5) + (y – 5)]/ 2 = 23 ⇒ x + y = 46 + 10 = 56 Given, ⇒ (x + y + z)/3 = 20 ⇒ x + y + z = 60 ⇒ 56 + z = 60 ⇒ z = 4 ∴ Child is 4 years old now.
9.8 × 77.9 ÷ (2.3)2 = ?
What approximate value will replace the question mark (?) in the following?
√48...
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....
You are provided with three sequences below. Determine the values of P, Q, and R, and then identify the relationship among them.<...
24.75% of 20.125% of 30.05% of 2196.06 = ?
Solve the following expression and calculate the approximate value.
802 of
– (8.002)³ + (30.001)² - (4.01)⁴ =?
6401.23 × `1 3/4` - 352.87 × ? = 10443.789
(11.99)2 + 171.16 + (3.33) 2 = ?2
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