Question
A boy goes to school with a speed of 50 km/h and comes
back with a speed of 30 km/h. find his average speed?Solution
Since the distance travelled by a boy (going to school and coming back from school) is equal. So, average speed = 2xy/(x + y) Average speed = (2 x 50 x 30)/(50 + 30) Average speed = (2 x 50 x 30)/80 = 37.5 km/hr
What is the average annual production of Crop C over the five years?
What is the mean of the following data given below:
3,7,9,5,11,13,8,12,15,12,4
What is the total number of female employees across all departments?
Kevin and Ben started a business with initial investments in the ratio of 4:5. After six months, Kevin increased his investment by 25%, and Ben increase...
A person has ₹5000. He invests 40% of it in scheme A at 8% per annum and the remaining in scheme B at 10% per annum. What is the total interest earned...
A triangle ABC is inscribed in a circle. The tangent at A meets the extended sides BC and AB at points P and Q, respectively.
If ∠ACB = 30° an...
How many 5-digit numbers can be formed using digits 1 to 5 without repetition such that the number is divisible by 5?
The equation∣ z-2i ∣ + ∣ z + 2i ∣ = 6 represents:
The derivative of y = eË£ · cos(x) isÂ
The main folder on a storage device is known as
Relevant for Exams:
