Question
A man can row 4.5 km/h in still
water but takes twice as long to row up a stream as down it. What is the rate of the stream in km/h?Solution
Uprate + downrate = 2 × 4`1/2` =9 km/h. Since downrate = 2x uprate is 9 km. uprate = 3km/h Speed of the current `4 1/2-3 = 1 1/2` km/h.
More Boats and streams Questions
16 × 35 + 119 + 23 × 17 = ? + 370
The value of 42 ÷ 9 of 6 - [64 ÷  48 x 3 – 15 ÷ 8 x (11 – 17) ÷ 9] ÷ 14 is:
15% of 360 × 20% of ? = 324
(62 - 52 ) % of 800 = 22 X √?
√2025 + √1024 - √1296 = 20% of ?
What will come in the place of question mark (?) in the given expression?Â
612 + 1250 - 728 = ? × 63
[(82 × 162)/12] - 28 = ?
