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Answer:
TOTAL DISTANCE TRAVELLED FROM 0 TO 40 SEC. = 937.5 m
ACCELERATION PRODUCED IN THE OBJECT FROM 0 TO 15 SEC. = 1 m/s²
EXPLANATION----
Distance travelled from 0 to 15 seconds = Area of trapezium
1/2 × (10 + 25) × 15
= 262.5 m
Distance travelled from 15 to 30 seconds = Area of rectangle
Length= 25
Breadth=15
Area = 25×15= 375 m
Distance travelled from 30 to 40 seconds = Area of trapezium
1/2 × (25+35) ×10
300 m
TOTAL DISTANCE= 937.5 m
Acceleration from 0 to 15 seconds = 25 -0/ 15-0
= 1 m/s²
HOPE IT HELPS YOU.
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