Question
The ratio of the speed of a boat in downstream and speed
of the stream is 7:2. If the speed of the current is 4 km/hr, then find the distance travelled (in km) upstream in 3 hours.Solution
Let speed of downstream and speed of stream be 7x and 2x respectively. Speed of current => 2x = 4 => x = 2 km/hr Downstream speed = 7 * 2 = 14 km/h Speed of boat = 14 - 4 = 10 km/hr Upstream speed = 10 - 4 = 6 km/h Distance travelled upstream in 3 hr = 6 * 3 = 18 km.
√1764 + 35 × 8 + 39 = ?2
18% of 200 - 16% of 150 = ?
25% of 30% of 3/5 of 14500 =?
2(1/3) + 2(5/6) – 1(1/2) = ? – 6(1/6)
7/3 of 4/5 of 15/56 of ? = 83
What will come in place of the question mark (?) in the following expression?
40% of 150 – ?% of 80 = 25% of 400
555.05 + 55.50 + 5.55 + 5 +0.55 = ?
64.5% of 800 + 36.4% of 1500 = (?)² + 38
What will come in the place of question mark (?) in the given expression?
25% of 1280 + (41 × 4) = ?2
Simplify the following expression:
((32)4 - 1)/33×31× (210+1)
