Question
A boat goes 9 km an hour in still water, but takes twice
as much time in going the same distance against the current. The speed of the current (in km/hour) is :Solution
Let the speed of the current be x kmph. According to the question, 9/(9 – x) = 2 ⇒ 18 – 2x = 9 ⇒ 2x = 18 – 9 ⇒ x = 9/2 = 4.5 km/hr
More Boats and streams Questions
242 + 80% of 1620 = ? Γ 16 β 35% of 800
(γ(0.5)γ^(1/3)Β Γ γ(1/125)γ^(1/4)Β Γ γ25γ^(1/6)Β Γγ(6.25)γ^(2/3))/(γ(2.5)γ^(2/3)Β Γ 5^(-1/2)Β Γ γ(1/5)γ^(-2)Γγ3125οΏ½...
What will come in the place of question mark (?) in the given expression?
35 X 72 + 35 X 28 = ? X β16Β
17.6% of 250 + β? = 70% of 90
√144 × √121 + 25% of 600 = ? + 256
(6630 Γ· 13 + 6120 Γ· 12) Γ· (17 Γ 3) = ?Β
40 Γ 5 + 27) Γ 9 = ?
- Evaluate: 168 Γ· 12 Γ 5 + 190 β 20% of 450
What will come in the place of question mark (?) in the given expression?
{180 + (2250/15)} Γ· 11 = ?2 + 14
