In a fixed time, a boy swims thrice the distance along the current that he swims against the current. If the speed of the current is 11 km/hr, the speed of the boy in still water is
Let the rate of swimming in still water be x km/hr Rate down-stream = (x + 11) km/hr Rate up-stream = (x – 11) km/hr According to the question, (x + 11) t = 3 (x – 11) × t x + 11 = 3x – 33 x = 22 km/hr
From January 1, 2021, the price of petrol (in Rupees per litre) on m' day of the year is 80 + 0-1m, where m = 1, 2, 3, …., 100 and thereafter remains...
In the series _b_a_ba_b_abab_aab; fill in the six blanks (_) using one of the following given four choices such that the series follows a specific order.
A man started from home at 14:30 hours and drove to village, arriving there when the village clock indicated 15:15 hours. After staying for 25 minutes,...
There are three points P, Q and R on a straight line such that PQ: QR = 3 : 5. If n is the number of possible values of PQ : PR, then what is n equal to ?
In a code language MATHEMATICS' is written as 'LBSIDNZUHDR'. How is CHEMISTRY' written in that code language?
There is a numeric lock which has a 3-digit PIN. The PIN contains digits 1 to 7. There is no repetition of digits. The digits in the PIN from left to r...
Jay and Vijay spent an equal amount of money to buy some pens and special pencils of the same quality from the same store. If Jay bought 3 pens and 5 p...
Consider the following statements :
1. The sum of 5 consecutive integers can be 100.
2. The product of three consecutive ...
When 70% of a number x is added to another number y, the sum becomes 165% of the value of y. When 60% of the number x is added to another number 2, the...
A biology class at high school predicted that a local population of animals will double in size every 12 years. The population at the beginning of the ...
