Reema goes to school by the speed of 3 km per hour and she returns from school by the speed of 4 km per hour if she takes total 21 minute in going and coming what is the total distance from home to school ??
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She goes to school at a speed of 3km/h.
And in coming she comes at a speed of 4km/h.
Total time taken =21 min
=21/60
=7/30
Distance1=x/3....(eq1)
D2=x/4......(eq2)
From eq 1 and 2 we get,
X/3 + x/4=7/30
3x+4x/12=7/30
210x=84
x=0.4
Hope it helped!
And in coming she comes at a speed of 4km/h.
Total time taken =21 min
=21/60
=7/30
Distance1=x/3....(eq1)
D2=x/4......(eq2)
From eq 1 and 2 we get,
X/3 + x/4=7/30
3x+4x/12=7/30
210x=84
x=0.4
Hope it helped!
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