Question
A cyclist moves at 25 km/h to
reach a checkpoint on time. If the speed is increased to 30 km/h, the cyclist will arrive 12 minutes earlier. Find the time taken to cover thrice the distance at 40 km/h.Solution
ATQ, Let the usual time taken by the cyclist be 'T' hours. Using, distance = speed × time We have, 'D' = 25T ----------- (I) And, 'D' = 30 × {T - (12/60)} -------- (II) From equation (I) and (II), We have, 25T = 30 × {T - (12/60)} Or, 25T = 30T - 30 × (12/60) Or, 5T = 6 Or, 'T' = 1.2 On putting the value of 'T' = 1.2 in equation (I), We have 'D' = 25 × 1.2 = 30 km So, the required time = (3 × 30) ÷ 40 = (90/40) = 2.25 hours
Which mineral is considered highly resistant to weathering due to its densely packed structure and lack of substitutions?
The addition of which substance is LEAST likely to result in immediate nitrogen loss from the soil?
Which of the following crop is/are soil salinity tolerant?
Which clay mineral group is known for its ability to swell and expand when wetted?
Soil moisture potential is measured with the help of ______instrument.
Which type of soil water, characterized by occupying larger pores and moving readily under gravity, might contribute to reduced aeration in the soil if ...
What is the primary reason for the non-expanding nature of fine-grained micas within the 2:1-type minerals?
The soil amendment used for the reclamation of Sodic soil is
Which of the following property of soil can’t be changed by any means?
Which factor significantly influences the decomposition rate of organic matter in soils?
Relevant for Exams:
