Question
Speed of the stream is 15 km/h and speed of boat in
still water is 24 km/h. A boat takes a total of 38 hours for travelling downstream from Point M to Point N and coming back to point Q which is midway of point M and N. What is the distance between M and N?Solution
Let the distance between M and N = a km Speed of boat in upstream = 24 – 15 = 9 kmph Speed of boat in downstream = 24 + 15 = 39 kmph It takes 38 hours to complete the whole distance, ⇒ a/39 + 1/2 × a/9 = 38 ⇒ a/39 + a/18 = 38 ⇒ 19a/234 = 38 ⇒ a = (38 × 234)/19 ⇒ a = 468 km
More Time and distance Questions
[(√576 × √144) ÷ √1296]2 = ? ÷ 3
Evaluate:
(24/6) + 3 × (5 - 2)2
What will come in the place of question mark (?) in the given expression?
{(16 × 25) ÷ 32} × 12 = ? – 200
Find the value of 40 ÷ 5 of 6 × [3 ÷ 6 × (12 – 6)] – (15 ÷ 3 of 30):
Calculate the value of x2, if [(8 + 62) ÷ 4 of x + 2.5 × 5 = 42 + 20% of 10].
- What will come in place of (?), in the given expression.
144 ÷ √36 + 13² – 100 = ? √? = 120 - 102 + ∛125
360 ÷ 9 + 15 % of 200 + ? * 10 = 45 * √25
- Determine the value of following expression:
[{(148 + 32) ÷ 9}% x 1350] + 19 280 – 70 × 14 ÷ 5 = ? – 21 of 3
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