Question If two-third of three-fourth of a number is 34, find the 20% of that number? Type multiple_choice Option 13 incorrect Option 13.6 correct Option 14 incorrect Option 14.6 incorrect Solution:
If two-third of three-fourth of a number is 34, find the 20% of that number? Read More »
Q. A room having dimension 12 m × 10 m × 3.5 m is required to be mechanically ventilated by air-conditioner. The temperature difference between outdoor ambient air and the supply air is 12 °C. Consider three air exchanges per hour. The volumetric specific heat of the air is 1250 J/m3 °C. Assume one ton
Question What is the unit digit in the product of 853 * 1346 * 452 * 226? Type multiple_choice Option 4 incorrect Option 5 incorrect Option 6 correct Option 8 incorrect Solution Pick up the unit digit of each number and multiply them; 3 in 853 6 in 1346 2 in 452 6 in 226
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Question Which of the following is the output of 495 * 495 – 105 * 105? Type multiple_choice Option 234000 correct Option 360000 incorrect Option 300000 incorrect Option 350000 incorrect Solution Apply formula; (a2 – b2) = (a – b) (a+b) 495 x 495 – 105 x 105 = (4952 – 1052) = (495 – 105) (495
Which of the following is the output of 495 * 495 – 105 * 105? Read More »
Question What is the average of first five natural numbers? Type multiple_choice Option 5 incorrect Option 2 incorrect Option 3 correct Option 4 incorrect Solution: Sum of first five natural numbers =1+2+3+4+5 = 15Number of quantities = 5On putting these values in formula:Average = 15/5= 3
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Question Two boys start running at the same time in the same direction at a speed of 10 km/hr and 12 km/hr respectively. In what time they will be 8 km apart? Type multiple_choice Option 3 hours incorrect Option 4 hours correct Option 5 hours incorrect Option 6 hours incorrect Solution : Both the boys
Q. A power shovel is having 1.8 m3 excavation output per batch of operation. The average cycle time of the batch operation is 45 seconds. The lost time per hour of the excavation activity is 10 minutes. Assume six working hours of operation per day. The amount of soil excavated by the power shovel per
Question Two pipes can fill a tank in 10 and 14 minutes respectively. A third pipe can empty the tank at the rate of10 liters/minute. If all the pipes working together can fill the empty tank in 8 minutes,what is the capacity of the tank? Type multiple_choice Option 210 liters incorrect Option 215.4 liters correct
Q. A depressed portion of a land is identified by three closed contours, as shown in the figure below. The area bounded by three contour lines are 6 m2, 24 m2 and 96 m2 respectively. The contour interval is 1 m. Using prismoidal method, the volume of the earth needed to fill the land depression
Question A tank can be filled in 10 hours. After a leak in its bottom, it takes 12 hours to fill the tank. Find the time taken by the leak to empty the full tank? Type multiple_choice Option 45 hours incorrect Option 60 hours correct Option 50 hours incorrect Option 55 hours incorrect Solution :
