railway Gujarat Metro SCTO Mock Test 2023 Quantitative Aptitude Speed Time and Distance Partial Speed
A boy is walking at a speed of P km/h to cover a distance of 1 km. However, due to slippery ground, his speed decreases by Q km/h (P > Q). If he takes R hours to cover the distance, then find the relation between R and Q.
1
1/R = P - Q
2
R + P - Q
3
R = P + Q
4
1/R = 1/P + 1/Q