Question
It takes 12 hours less to travel from point 'C' to point
'D' at a speed of 50 km/h than it takes to travel the same distance at 20 km/h. If 50% of the distance between 'C' and 'D' had been covered at a speed of 40 km/h and the remaining distance had been covered at a speed of 24 km/h, then what would be the total time taken to complete the journey?Solution
Let the distance between points 'C' and 'D' be d km. According to the question: 
What will come in the place of question mark (?) in the given expression?
48 X 2.5 + 20% of 150 = ? + 166
36% of 640 β 12.5% of 352 + 25% of 640 = ? β 48% of 432
What will come in the place of question mark (?) in the given expression?
13 X ? = 85 X 4 + β81 + 2
242 + 18 Γ 8 β ? = 356
32% of 450 + 60% of 150 = ? Γ 9
(18 x 3) + (36 x 8) = ? + 10
(54/6) Γ 5 + 12 Γ (17/2) = ?% of 700
(350/?) = 23 + 33