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Start learning 50% faster. Sign in nowLet the speed of boat in still water and speed of stream be 'x' km/hr and 'y' km/hr, respectively. According to question; (170/x) - (120/x) = 5 Or, (50/x) = 5 So, x = 10 Now, 8 x (10 + y) = 8 x (10 - y) + 16 Or, 80 + 8y = 80 - 8y + 16 Or, 16y = 16 So, y = 1 So, downstream speed of the boat = (10 + 1) = 11 km/hr And, upstream speed of the boat = (10 - 1) = 9 km/hr Required time taken = (300/11) + (150/9) ~ (27 + 17) ~ 44 hours
If 32x + 1– 3x= 3x + 3– 32, then values of x are:
(560 ÷ 32) × (720 ÷ 48) = ?
72% of 486 – 64% of 261 = ?
56 × 18 + ? × 21 – 49 × 12 = 63 × 26
√4096 + √3249 = (?)2
125% of 80 – 6 × 4 = ? × 13 – 54
((1024)n/5 × (42n+1 ))/(16n × 4n-1 ) = ?