Start learning 50% faster. Sign in now
Initial sum of the ages of 6 children = 8 x 6 = 48 years Ages of the children leaving: 8 + 2 = 10 years and 8 + 4 = 12 years, Sum of the ages of children leaving = 10 + 12 = 22 years Sum of the ages after two children left = 48 - 22 = 26 years Sum of the ages of 5 new children = (8 + 3) x 5 = 55 years Total sum of the ages with new children = 26 + 55 = 81 years Number of children now = 6 – 2 + 5 = 9 New average age = 81/9 = 9 years
A train 130 meters long travelling at 54 km/hr crosses the bridge in 30 sec. Then the length of the bridge is:
An agricultural field is in the form of rectangle having length X1 meters and breadth X2 meters. (X1 and X2 are variables). If X1 + X2 = 40 meters, then...
An iron pillar consists of two parts: one in the shape of a right circular cylinder and the other in the shape of a right circular cone. The radius of b...
The area of the rectangular field is 720 m² and its perimeter is 106 m. Find how much percent less the breadth of the field is compared to the length o...
The sum of the perimeter of circle R and S together is 1012 cm. If the area of circle S is 18634 cm2 , then the radius of circle R is approxi...