Question
A boat running downstream covers a distance of 36 km in
3 hrs while it covers the same distance upstream in 4 hrs. Then speed of the boat in still water isSolution
Let the speed of boat in still water be a km/hr and that of stream be b km/hr. Therefore, 36/(a + b)= 3 ⇒ a + b = 12 ………..(i) 36/(a – b)= 4 ⇒ a + b = 9 ………..(ii) On adding, eq (i) and (ii) ⇒ 2a = 21 km/hr ⇒ a = 10.5 km/hr
More Boats and streams Questions
36×?² + (25% of 208 +13) = 60% of 2400 + 17×18
? × 5.5 = √1225 + 40% of 30% of 37.5% of 5000 – 63
The value of (43-3× (4×6+12/6 ×6-4×5) +4)?
960 ÷ 12 + 1200 ÷ √144 + ? = 180 * 3
315 ÷ 9 + 23 × 3+ 22 = ?× √441
What will come in the place of question mark (?) in the given expression?
7 X 18 + ? = (52 - 6) X 9
What will come in the place of question mark (?) in the given expression?
(28/14) of 56 + ? = 920 ÷ 5
?2 × 25 = 42 × 21 + 172Â
8 × 25% of ? = 400
- 45% of 160 – 25% of 80 = 20% of ?
