A car cover first half of the distance with 60kmph and
second half of the distance with 40kmph what is the average
speed?

Answer Posted / divyanshu

d/40 +d/60 =2d/a
1/40 +1/60 =2d/a
3a+2a=120 (2)
5a=240
a=240÷5
a=48km hrs

Is This Answer Correct ?    12 Yes 6 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

State the necessary condition for the extreme value.

564


Explain about Mathematical language & symbolism.

596


Write the condition for critical point (a,b) to become a function f(x,y) maximum.

542


find 55/1000=___

588


Explain the concept of experiential learning in Mathematics.

608






if the length of the cycloid is 4 times the diameter of a rotating circle, then the area under the arch traced out by that cycloid is how many times the area of therotating circle?

573


A country adopted a policy requiring all couples to continue having children until they had a girl, after which they must stop having children. How many children willthe average family have and what will the sex distribution be?

577


State and prove necessary condition for extreme values of the function f (x,y)

558


What is the Value of [(3x+8y)/(X-2y)]; If X/2y=2?

622


the ages of two brothers are now in the ratio 4:3 but fifteen years ago, they were in the ratio 3:2the present age are

556


Explain the paradigm shift in the nature of Mathematics from empirical to rational.

555


explain cognitive constructivism.

573


how do we get the volume of sand

2082


explain the disciplinary values of teaching mathematics.

778


Briefly explain the disciplinary values of teaching mathematics.

655