Robert Bosch Time & Work Quiz-2

Answer: 15.4 sec

Explanation: Speed of train relative to boy = Speed of train + Speed of boy = 50+ 6 = 56 km/hr = 56 × 5/18 m/sec = 140/9 m/sec Time taken to pass the boy = Distance/Speed = 240 × 9/140 = 15.4 sec

Answer: Number of coins of each type are 20, 36 and 16 respectively.

Explanation: The ratio of the number of coins is given as 5: 9: 4. Let the number of coins of each type be 5x, 9x and 4x respectively. The total value of coins is given as Rs. 206. The value of each type of coin can be calculated as follows: 50 P coin = 50/100 = 1/2 25 P coin = 25/100 = 1/4 10 P coin = 10/100 = 1/10 The total value of coins can be calculated as follows: (50 × 5x)/100 + (25 × 9x)/100 + (10 × 4x)/100 = 206 250x + 225x + 40x = 20600 515x = 20600 x = 4 Therefore, number of coins of each type are 20, 36 and 16 respectively.

Answer: 23/24

Explanation: The likelihood that none of the three students will be able to answer the issue is equal to 1 - (1/2, 1/3, and 1/4) = 1/24. As a result, the likelihood that the issue will be resolved is equal to 1 - (1/24) = 23/24.

Answer: 100 m

Explanation: Speed of train = Distance/Time Distance = Speed × Time = 100/9 × 9 = 100 m

Answer: 9.3 mins

Explanation :  Time taken to cover 10 km: 10/64 x 60 min= 75/8 min= 9.3 mins

Answer: 9

Explanation: Let the ages of children be x, (x + 4), (x + 8), (x + 12) 

Then, x + (x + 4) + (x + 8) + (x + 12) = 60

4x + 24= 60

4x = 60-24

4x = 36

x = 9

Answer: 14 years

Explanation: Let kishan’s  age be x years. Then, Ram’s  age = 2x years. Shyam’s  age = (2x + 3) years.

(2x + 3) + 2x + x = 36

5x = 35

x = 7.

Hence, Ram’s age = 2x = 14 years.

Answer: 12000

Explanation: Loan Sum = P = Rs 10000
Rate of Interest per year = R = 10%
Time (T) = 2 year

SI = (P × R ×T) / 100 

    = (10000 × 10 ×2) / 100
    = Rs 2000

Total Amount that Rajesh has to pay to the bank at the end of the year 

Amount = Principal + Simple Interest

               = 10000 + 2000
              = Rs 12,000

Answer:28

Explanation:Any two digit number can be written as (10P + Q), where P is the digit in the tens place and Q is the digit in the units place.

P + Q = 10 ----- (1)

(10Q + P) - (10P + Q) = 54

9(Q - P) = 54

(Q - P) = 6 ----- (2)

Solve (1) and (2) P = 2 and Q = 8

The required number is = 28

Answer: 200m

Explanation: Speed=(80 * 5/18) m/sec = (200/9) m/sec Length of the train = (Speed x Time) = (200/9 * 9) m = 200 m.