Latihan Soal Pemodelan untuk Komputasi : Computational Thinking II
Platform Length
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/h, what is the length of the platform ?
Train Passing
Train travelling at a speed of 8 km/h enters a tunnel 3 km long. The train is 1 km long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?
Man on a Box
A box having a length 3 m and breadth 2 m is floating on a lake. The box sinks by 0.01 m when a man gets on it. The density of the water of the lake is 1000 Kg/m3. What is the mass of the man?
Hello From Another Plane !!
Bob departed from Jakarta to Bandung at the same time as Alice departed from Bandung to Jakarta. The distance from Jakarta to Bandung is 170 km. If Bob’s average speed is 80 km/h and Alice’s average speed is 90 km/h. How long does it take for Bob and Alice to meet?
Speed Up
A car traveled from Jakarta to Padalarang in 5 hours. Then the car traveled back from Padalarang to Jakarta in 4 hours. If the distance between Jakarta and Padalarang is 160 km then how much speed increase did the car was needed to make on the second journey compared to the first journey?
Coin Change
Every candy shop in Wombat Land always have 3 stacks of coins for change: W$100, W$50, and W$25. A customer came to one of the shop. She paid with W$500 coin for a W$325 worth candy bag. How many coins did she get as change?
Magic Number #1
A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. What number is it?
Magic Number #2
The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?
The Chosen 4
In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?
More Water Please !
In a mixture 60 litres, the ratio of milk and water is 2 : 1. If this ratio is to be 1 : 2, then what is the quantity of water to be further added ?
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