ATQ, Let the upstream speed and downstream speed of the boat be x km/h and y km/h, respectively. So according to question: 66/x + 165/y = 13 ………………. (i) Also, 55/x + 110/y = 9 ……….. (ii) Solving (i) and (ii), we get x = 11 and y = 22 So, the upstream speed and downstream speed of the boat are 11 km/h and 22 km/h, respectively. Speed of the boat in still water = (11 + 22)/2 = 16.5 km/h Speed of the stream = (22 – 11)/2 = 5.5 km/h So, the desired difference = 16.5 – 5.5 = 11 km/h
(32.1)² + (46.8)² - (28.8)² =? + 2257.97
Ravi is 12 years younger than Surya. Ravi's age is 40% of the sum of his and Surya's age. What will be Surya's age 9 years hence?
(13)2 - 3127 ÷ 59 = ? x 4
Find the simplified value of the given expression:
(12 ÷ 3 of 2 + 11 of 2) ÷ 4
If a³ - b³ = (a - b)(a² + ab + b²), find a³ - b³ when a = 10 and b = 4.
315 ÷ 9 + 23 × 3+ 22 = ?× √441
(122 - 82 ) of 52 + 52 = ?2
If A = 0.84181818... then what will be the difference between the numerator and denominator of the lowest fraction form of A?
Find the value of 45 - 3 x (4 of 6 + 12 ÷ 3 × 6 – 4 × 5) + 6.
72% of 400 – 23% of 1020 = 120% of ?
