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Since, the speed of the bike increases by 4 km/hr after every 1 hour, therefore the bike will travel 4 km extra after every 1 hour. Therefore, distance travelled by the bike in 1st hour = 30 km Distance travelled by the bike in 2nd hour = 30 + 4 = 34 km Distance travelled by the bike in 3rd hour = 34 + 4 = 38 km This form an AP i.e. 30, 34, 38………distance travelled in 10th hour Therefore, total distance travelled by the bike in 10 hours = sum of the AP Distance travelled in 10 hours = (n/2){2a + (n – 1)d} Where n = number of terms = 10, a = 1st term = 30 and d = common difference = 4 Therefore, distance travelled in 10 hours = (10/2){2 × 30 + (10 – 1) × 4} = (10/2)(60 + 36) = 480 km
By mistake, instead of dividing Rs. 564 among P, Q and R in the ratio 1/3 : 1/4 : 1/5 it was divided in the ratio of 3 : 4 : 5. Who gains the most and b...
Among 132 examinees of a certain school, the ratio of successful to unsuccessful students is 9 : 2, Had 4 more students passed, then the ratio of succes...
The speed of the boat A and B in still water are in the ratio 15:13. The speed of the current for both boats is 16 km/hr. If the sum of time taken by bo...
The sum of two numbers is 25 and their difference is 15. The ratio of the numbers is:
In a mixture 'P', the ratio of milk to water is 7:5. In another mixture 'Q', the ratio is 1:2. If 72 litres of P and 54 litres of Q are mixed, find the ...
A student's scores in four subjects are in the ratio 3:4:5:6. The student achieved an overall average of 72% on the exam. If the maximum possible score ...
