If the numerator of a fraction is increased by 300% and the denominator is increased by 260% the resultant fraction is 9/11. What is the original fraction ?

Tripti, Rani and Madhulika begin to jog around a circular stadium. They complete their revolution in 64 sec, 36 sec and 43 sec respectively. After how many seconds will they be together at the starting point ?

The cost of 13 kg of rice is Rs 195. The cost of 17 kg of pulses is Rs 544 and the cost of 21 kg of flour is Rs 336. What is the total cost of 21 kg of rice, 26 kg of pulse and 19 kg of flour ?