Question

shanti cover a certain distance in 42 minutes she cover two - third of the distance at 4 km/hour speed and the remaining distance at 5 km / hour speed find the total distance covered by her​

Answer 1

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Find Distance ??

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Let Total distance = X km.....

and,

T = D/S

A/q,

(2x/3)*(1/4) + (x/3)*(1/5) = 42/60

(x/6) + (x/15) = 7/10

(5x+2x)/30 = 7/10

7x/30 = 7/10

x = 3 km (Ans)

(Mark as brainlist)