Question

A train moves from one station to another in 2 hour time. Using the speed-time graph of the motion, calculate distance covered during time interval from 0.75 hr to 1 hr.

• A. 10 km
• B. 5 km
• C. 15 km
• D. 20 km

Answer 1

Answer: (A)

10 km

Answer 2

Distance covered during 0.75 hr. to 1 hr. = Area enclosed under the curve ABC = Area of $\Delta$BGC + Area of rectangle EFGB = $\frac{1}{2} \times$ BG $\times$ GC + EF $\times$ FG = $\frac{1}{2}$(0.25 $\times$ 40 ) + 0.25 $\times$ 20 = 5 + 5 = 10 km