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Sheetal’s speed= 40 km/hr. Time taken by Sheetal = 5 hrs. Distance = Speed × Time = 40 × 5 = 200 km. ∴ Distance covered by Hemlata = 200 km. Time taken by Hemalata = 4 hrs. ∴ Hemlata’s Speed = (Distance )/Time = (200 )/4 = 50 km/hr. Sheetal’s increased speed= 50 km/hr. ∴ Time taken by Sheetal = (200 )/50 = 4 hrs. Hemlata’s increased speed = 60 km/hr. ∴ Time taken by Hemlata = (200 )/60 = 3(1/3) = 3hrs 20 minutes. ∴ Required difference = 4 hrs – 3hrs 20 minutes = 40 minutes.
If 94*6714 is divisible by 11, where * is a digit, then * is equal to
What least number must be added to 6834 to get a number exactly divisible by 18?
Find the value of 6 + 66 + 666 + 6666 +hellip;hellip;hellip;hellip;.. + n terms.
1. `(2)/(3) ((10 xx (10^(n)- 1))/9 - n)`
2.
The sum of two numbers is 18 while the sum of their squares is 164. Find the sum of the cubes of those two numbers.
A number leaves a remainder of 12 when divided by 19. What will be the remainder when three times that number is divided by 19?
The sum of two numbers is 30 while the difference between these two numbers is 6. What is 50% of the product of the two numbers?