Question
On a circular racetrack that measures 4,000 meters in
circumference, Kia and Sia begin a race at the same point and at the same time, traveling at speeds of 90 km/h and 18 km/h, respectively. If the race continues for 40 minutes, how many times will Kia and Sia meet again at the starting point?Solution
Speed of Kia = 90 X (5/18) = 25 m/s Speed of Sia = 18 X (5/18) = 10 m/s Time taken by Kia to complete one round = (4,000/25) = 160 seconds Time taken by Sia to complete one round = (4,000/10) = 400 seconds Time after which both of them will meet at the same starting point = LCM of 160 and 400 = 800 seconds Therefore, number of times they meet in 40 minutes = (40 X 60) ÷ 800 = 3
√? = 120 - 102 + ∛125
350% of (450 / 1.5) = ?% of 4200Â Â
The value of (43-3× (4×6+12/6 ×6-4×5) +4)?
? = 6.25% of 240 + 25 2 + 17 2 – 16 × 17
What value should come in place of (?) question mark.
(5/9 of 396) − (35% of 320) + 7.2 = ?
What will come in the place of question mark (?) in the given expression?
[{(24) 2 ÷ (6) 2 } ÷ 8]4 = ? ÷ 5
The value of 42 ÷ 9 of 6 - [64 ÷  48 x 3 – 15 ÷ 8 x (11 – 17) ÷ 9] ÷ 14 is:
3.3 Times 2/27 of 40% of 364=?
What value should come in place of the question mark (?) in the following question?
2000 ÷ 10 + 250 × 2 �...
Simplify the following expressions and choose the correct option.
(3/4 of 528) − (2/3 of 135) = ?
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