A file of cadets consisting of ten rows and five columns measures 420 m in length along the direction of their marching. How much time (in hours and minutes) would it take to march for a stretch of 3 km, if the stride of each cadet is 80 cm and he takes 57 strides per minute?
1 hr 10 min
1 hr 20 min
1 hr 24 min
1 hr 15 min
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Answer:
Ans is =1 hr 15 min
Step-by-step explanation:
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