Question
A boat moves upstream at 18 km/hr. If it covers 270 km
downstream in 5 hours, determine the speed of the current.Solution
Let the speed of the current be ‘x’ km/hr Therefore, speed of the boat in still water = (x + 18) km/hr According to the question, (x + 18 + x) = 270/5 Or, 2x + 18 = 54 Or, 2x = 36 Or, x = 18 Therefore, speed of the current = 18 km/hr
More Boats and streams Questions
36% of 640 – 12.5% of 352 + 25% of 640 = ? – 48% of 432
- Find the value of:
35% of [150% of (45 + 15) + 150] ÷ 75 × 80 What will come in the place of question mark (?) in the given expression?
(30 × 5 + 20) × 2 = ?
115 ÷ 23 + 12 × 6 = ? + 16 - 35
17% of 250 + ? = 108
15% of 1800 + 22 = ?Â
46.2 × 8.4 × 3 + ? = 1200
What will come in place of the question mark (?) in the following expression?
40% of 150 – ?% of 80 = 25% of 400
The value of 42 ÷ 9 of 6 - [64 ÷  48 x 3 – 15 ÷ 8 x (11 – 17) ÷ 9] ÷ 14 is:
128 ÷ 22 × ? = 15% of 300 ÷ 9
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